Mona Kristiansen Beyer

• Moltu, Sissel Jennifer; Nordvik, Tone; Rossholt, Madelaine; Wendel, Kristina; Chawla, Maninder Singh & Server, Andrés [Show all 18 contributors for this article] (2023). Arachidonic and docosahexaenoic acid supplementation and brain maturation in preterm infants; a double blind RCT. Clinical Nutrition. ISSN 0261-5614. 43(1), p. 176–186. doi: 10.1016/j.clnu.2023.11.037.
• Nome, Terje; Enriquez, Brian Anthony; Nome, Cecilie; Tennøe, Bjørn; Lund, Christian & Skjelland, Mona [Show all 8 contributors for this article] (2023). Clinical outcome after thrombectomy in patients with MeVO stroke: importance of clinical and technical factors. Journal of Neurology. ISSN 0340-5354. 1(2), p. 877–886. doi: 10.1007/s00415-023-12025-1. Full text in Research Archive
• Lindland, Elisabeth Margrete Stokke; Solheim, Anne Marit; Andreassen, Silje; Bugge, Robin Antony Birkeland; Eikeland, Randi & Reiso, Harald [Show all 10 contributors for this article] (2023). Dynamic contrast-enhanced MRI shows altered blood–brain barrier function of deep gray matter structures in neuroborreliosis: a case–control study. European Radiology Experimental. 7(1). doi: 10.1186/s41747-023-00365-6. Full text in Research Archive
• MacIntosh, Bradley; Liu, Qinghui; SCHELLHORN, TILL; Beyer, Mona K.; Groote, Inge Rasmus & Morberg, Pål [Show all 20 contributors for this article] (2023). Radiological features of brain hemorrhage through automated segmentation from computed tomography in stroke and traumatic brain injury. Frontiers in Neurology. ISSN 1664-2295. 14. doi: 10.3389/fneur.2023.1244672. Full text in Research Archive
• Hodel, Jérôme; Vernooij, Meike W.; Beyer, Mona K.; Severino, Mariasavina; Leclerc, Xavier & Créange, Alain [Show all 15 contributors for this article] (2023). Multiple sclerosis imaging in clinical practice: a European-wide survey of 428 centers and conclusions by the ESNR Working Group. European Radiology. ISSN 0938-7994. 33, p. 7025–7033. doi: 10.1007/s00330-023-09701-1.
• Sandvig, Heidi Vihovde; Aam, Stina; Alme, Katinka Nordheim; Askim, Torunn; Beyer, Mona K. & Ellekjær, Hanne [Show all 16 contributors for this article] (2023). Plasma Inflammatory Biomarkers Are Associated With Poststroke Cognitive Impairment: The Nor-COAST Study. Stroke. ISSN 0039-2499. 54(5), p. 1303–1311. doi: 10.1161/STROKEAHA.122.041965. Full text in Research Archive
• Enriquez, Brian Anthony; Nome, Terje; Nome, Cecilie; Tennøe, Bjørn; Lund, Christian & Beyer, Mona K. [Show all 8 contributors for this article] (2023). Predictors of outcome after endovascular treatment for tandem occlusions: a single center retrospective analysis. BMC Neurology. ISSN 1471-2377. 23, p. 1–9. doi: 10.1186/s12883-023-03127-4. Full text in Research Archive
• Aamodt, Eva Birgitte; Alnæs, Dag; de Lange, Ann-Marie Glasø; Aam, Stina; Schellhorn, Till & Saltvedt, Ingvild Tina [Show all 8 contributors for this article] (2022). Longitudinal brain age prediction and cognitive function after stroke. Neurobiology of Aging. ISSN 0197-4580. 122, p. 55–64. doi: 10.1016/j.neurobiolaging.2022.10.007. Full text in Research Archive
• Einstad, Marte Stine; SCHELLHORN, TILL; Thingstad, Pernille; Lydersen, Stian; Aamodt, Eva Birgitte & Beyer, Mona K. [Show all 8 contributors for this article] (2022). Neuroimaging markers of dual impairment in cognition and physical performance following stroke: The Nor-COAST study. Frontiers in Aging Neuroscience. ISSN 1663-4365. 14, p. 1–12. doi: 10.3389/fnagi.2022.1037936. Full text in Research Archive
• Andreassen, Silje; Lindland, Elisabeth Margrete Stokke; Beyer, Mona K.; Solheim, Anne Marit; Ljøstad, Unn & Mygland, Åse Daasvand [Show all 13 contributors for this article] (2022). Assessment of cognitive function, structural brain changes and fatigue 6 months after treatment of neuroborreliosis. Journal of Neurology. ISSN 0340-5354. doi: 10.1007/s00415-022-11463-7. Full text in Research Archive
• Rise, Henning Hoel; Brune, Synne; Chien, Claudia; Berge, Tone; Bos, Steffan Daniel & Andorrà, Magí [Show all 23 contributors for this article] (2022). Brain disconnectome mapping derived from white matter lesions and serum neurofilament light levels in multiple sclerosis: A longitudinal multicenter study. NeuroImage: Clinical. ISSN 2213-1582. 35, p. 1–11. doi: 10.1016/j.nicl.2022.103099. Full text in Research Archive
• Aamodt, Eva Birgitte; Lydersen, Stian; Alnæs, Dag; SCHELLHORN, TILL; Saltvedt, Ingvild & Beyer, Mona K. [Show all 7 contributors for this article] (2022). Longitudinal Brain Changes After Stroke and the Association With Cognitive Decline. Frontiers in Neurology. ISSN 1664-2295. 13, p. 1–13. doi: 10.3389/fneur.2022.856919. Full text in Research Archive
• Brune, Synne; Høgestøl, Einar August; de Rodez Benavent, Sigrid Aune; Berg-Hansen, Pål; Beyer, Mona K. & Leikfoss, Ingvild Sørum [Show all 23 contributors for this article] (2022). Serum neurofilament light chain concentration predicts disease worsening in multiple sclerosis. Multiple Sclerosis. ISSN 1352-4585. 28(12), p. 1859–1870. doi: 10.1177/13524585221097296. Full text in Research Archive
• Nes, Dragana; Berg-Hansen, Pål; de Rodez Benavent, Sigrid Aune; Høgestøl, Einar August; Beyer, Mona K. & Rinker, Daniel Allen [Show all 12 contributors for this article] (2022). Exploring Retinal Blood Vessel Diameters as Biomarkers in Multiple Sclerosis. Journal of Clinical Medicine. ISSN 2077-0383. 11(11). doi: 10.3390/jcm11113109. Full text in Research Archive
• Andreassen, Silje; Solheim, Anne Marit; Ljøstad, Unn; Mygland, Åse Daasvand; Lorentzen, Åslaug Rudjord & Reiso, Harald [Show all 10 contributors for this article] (2022). Cognitive function in patients with neuroborreliosis: A prospective cohort study from the acute phase to 12 months post treatment. Brain and Behavior. ISSN 2162-3279. 12(6). doi: 10.1002/brb3.2608. Full text in Research Archive Show summary

  Background: Long-term cognitive problems after neuroborreliosis treatment remain a subject of debate. We have previously shown that cognitive problems are not present in the acute phase of neuroborreliosis, although fatigue is common. The aim of this study was to re-assess the same patient cohort and evaluate long-term outcomes. Methods: In this follow-up, we re-assessed 58 patients with well-characterized neuroborreliosis 12 months after completing treatment. The same protocol with eight subtests measuring attention and processing speed and the Fatigue Severity Scale (FSS) were used to compare the results from the acute phase to 12 months post treatment. Results: We found no changes in attention or processing speed but a reduction in the level of fatigue (median score on FSS: 4.9 vs. 3.9, p < .001) from the acute phase to 12 months post treatment. Conclusion: The patient group did not develop problems with attention or processing speed post treatment, while the level of fatigue decreased.

• Lindland, Elisabeth Margrete Stokke; Solheim, Anne Marit; Dareez, Muhammad Nazeer; Eikeland, Randi; Ljøstad, Unn & Mygland, Åse Daasvand [Show all 10 contributors for this article] (2022). Enhancement of cranial nerves in Lyme neuroborreliosis: incidence and correlation with clinical symptoms and prognosis. Neuroradiology. ISSN 0028-3940. 64, p. 2323–2333. doi: 10.1007/s00234-022-02957-2. Full text in Research Archive Show summary

  Purpose Symptoms of cranial neuritis are a common presentation of Lyme neuroborreliosis (LNB). Imaging studies are scarce and report contradictory low prevalence of enhancement compared to clinical studies of cranial neuropathy. We hypothesized that MRI enhancement of cranial nerves in LNB is underreported, and aimed to assess the prevalence and clinical impact of cranial nerve enhancement in early LNB. Methods In this prospective, longitudinal cohort study, 69 patients with acute LNB were examined with MRI of the brain. Enhancement of cranial nerves III–XII was rated. MRI enhancement was correlated to clinical fndings of neuropathy in the acute phase and after 6 months. Results Thirty-nine of 69 patients (57%) had pathological cranial nerve enhancement. Facial and oculomotor nerves were most frequently afected. There was a strong correlation between enhancement in the distal internal auditory canal and parotid segments of the facial nerve and degree of facial palsy (gamma=0.95, p<.01, and gamma=0.93, p<.01), despite that 19/37 nerves with mild-moderate enhancement in the distal internal auditory canal segment showed no clinically evident palsy. Oculomotor and abducens nerve enhancement did not correlate with eye movement palsy (gamma=1.00 and 0.97, p=.31 for both). Sixteen of 17 patients with oculomotor and/or abducens nerve enhancement had no evident eye movement palsy. Conclusions MRI cranial nerve enhancement is common in LNB patients, but it can be clinically occult. Facial and oculomotor nerves are most often afected. Enhancement of the facial nerve distal internal auditory canal and parotid segments correlate with degree of facial palsy.

• Ihle-Hansen, Håkon; Ihle-Hansen, Hege; Fure, Brynjar; Thommessen, Bente; Helland, Gisle Berg & Øksengård, Anne Rita [Show all 10 contributors for this article] (2021). Carotid Atherosclerosis and Longitudinal Changes of MRI Visual Rating Measures in Stroke Survivors: A Seven-Year Follow-Up Study. Journal of Stroke & Cerebrovascular Diseases. ISSN 1052-3057. 30(10), p. 1–6. doi: 10.1016/j.jstrokecerebrovasdis.2021.106010. Full text in Research Archive
• Lauvsnes, Maria Boge; Zetterberg, Henrik; Blennow, Kaj; Kvaløy, Jan Terje; Tjensvoll, Anne Bolette & Maroni, Stian [Show all 14 contributors for this article] (2021). Neurofilament light in plasma is a potential biomarker of central nervous system involvement in systemic lupus erythematosus. Journal of Neurology. ISSN 0340-5354. doi: 10.1007/s00415-021-10893-z.
• Aamodt, Eva Birgitte; SCHELLHORN, TILL; Stage, Edwin; Sanjay, Apoorva Bharthur; Logan, Paige E. & Svaldi, Diana Otero [Show all 9 contributors for this article] (2021). Predicting the Emergence of Major Neurocognitive Disorder Within Three Months After a Stroke. Frontiers in Aging Neuroscience. ISSN 1663-4365. 13, p. 1–13. doi: 10.3389/fnagi.2021.705889. Full text in Research Archive Show summary

  Background: Neurocognitive disorder (NCD) is common after stroke, with major NCD appearing in about 10% of survivors of a first-ever stroke. We aimed to classify clinical- and imaging factors related to rapid development of major NCD 3 months after a stroke, so as to examine the optimal composition of factors for predicting rapid development of the disorder. We hypothesized that the prediction would mainly be driven by neurodegenerative as opposed to vascular brain changes. Methods: Stroke survivors from five Norwegian hospitals were included from the “Norwegian COgnitive Impairment After STroke” (Nor-COAST) study. A support vector machine (SVM) classifier was trained to distinguish between patients who developed major NCD 3 months after the stroke and those who did not. Potential predictor factors were based on previous literature and included both vascular and neurodegenerative factors from clinical and structural magnetic resonance imaging findings. Cortical thickness was obtained via FreeSurfer segmentations, and volumes of white matter hyperintensities (WMH) and stroke lesions were semi-automatically gathered using FSL BIANCA and ITK-SNAP, respectively. The predictive value of the classifier was measured, compared between classifier models and cross-validated. Results: Findings from 227 stroke survivors [age = 71.7 (11.3), males = (56.4%), stroke severity NIHSS = 3.8 (4.8)] were included. The best predictive accuracy (AUC = 0.876) was achieved by an SVM classifier with 19 features. The model with the fewest number of features that achieved statistically comparable accuracy (AUC = 0.850) was the 8-feature model. These features ranked by their weighting were; stroke lesion volume, WMH volume, left occipital and temporal cortical thickness, right cingulate cortical thickness, stroke severity (NIHSS), antiplatelet medication intake, and education. Conclusion: The rapid (<3 months) development of major NCD after stroke is possible to predict with an 87.6% accuracy and seems dependent on both neurodegenerative and vascular factors, as well as aspects of the stroke itself. In contrast to previous literature, we also found that vascular changes are more important than neurodegenerative ones. Although possible to predict with relatively high accuracy, our findings indicate that the development of rapid onset post-stroke NCD may be more complex than earlier suggested.

• Schellhorn, Till; Aamodt, Eva Birgitte; Lydersen, Stian; Aam, Stina; Wyller, Torgeir Bruun & Saltvedt, Ingvild [Show all 7 contributors for this article] (2021). Clinically accessible neuroimaging predictors of post-stroke neurocognitive disorder: a prospective observational study. BMC Neurology. ISSN 1471-2377. 21(1), p. 1–11. doi: 10.1186/s12883-021-02117-8. Full text in Research Archive
• Høgestøl, Einar August; Ghezzo, Samuele; Nygaard, Gro Owren; Espeseth, Thomas; Sowa, Piotr & Beyer, Mona K. [Show all 10 contributors for this article] (2021). Functional connectivity in multiple sclerosis modelled as connectome stability: A 5-year follow-up study. Multiple Sclerosis. ISSN 1352-4585. p. 1–9. doi: 10.1177/13524585211030212. Full text in Research Archive
• Schellhorn, Till; Zucknick, Manuela; Askim, Torunn; Munthe-Kaas, Ragnhild; Ihle-Hansen, Hege & Seljeseth, Yngve Müller [Show all 13 contributors for this article] (2021). Pre-stroke cognitive impairment is associated with vascular imaging pathology: a prospective observational study. BMC Geriatrics. ISSN 1471-2318. 21:362, p. 1–10. doi: 10.1186/s12877-021-02327-2. Full text in Research Archive Show summary

  Background: Chronic brain pathology and pre-stroke cognitive impairment (PCI) is predictive of post-stroke dementia. The aim of the current study was to measure pre-stroke neurodegenerative and vascular disease burden found on brain MRI and to assess the association between pre-stroke imaging pathology and PCI, whilst also looking for potential sex differences. Methods: This prospective brain MRI cohort is part of the multicentre Norwegian cognitive impairment after stroke (Nor-COAST) study. Patients hospitalized with acute ischemic or hemorrhagic stroke were included from five participating stroke units. Visual rating scales were used to categorize baseline MRIs (N = 410) as vascular, neurodegenerative, mixed, or normal, based on the presence of pathological imaging findings. Pre-stroke cognition was assessed by interviews of patients or caregivers using the Global Deterioration Scale (GDS). Stroke severity was assessed with the National Institute of Health Stroke Scale (NIHSS). Univariate and multiple logistic regression analyses were performed to investigate the association between imaging markers, PCI, and sex. Results: Patients’ (N = 410) mean (SD) age was 73.6 (±11) years; 182 (44%) participants were female, the mean (SD) NIHSS at admittance was 4.1 (±5). In 68% of the participants, at least one pathological imaging marker was found. Medial temporal lobe atrophy (MTA) was present in 30% of patients, white matter hyperintensities (WMH) in 38% of patients and lacunes in 35% of patients. PCI was found in 30% of the patients. PCI was associated with cerebrovascular pathology (OR 2.5; CI = 1.4 to 4.5, p = 0.001) and mixed pathology (OR 3.4; CI = 1.9 to 6.1, p = 0.001) but was not associated with neurodegeneration (OR 1.0; CI = 0.5 to 2.2; p = 0.973). Pathological MRI markers, including MTA and lacunes, were more prevalent among men, as was a history of clinical stroke prior to the index stroke. The OR of PCI for women was not significantly increased (OR 1.2; CI = 0.8 to 1.9; p = 0.3).

• Andreassen, Silje; Lindland, Elisabeth Margrete Stokke; Solheim, Anne Marit; Beyer, Mona K.; Ljøstad, Unn & Mygland, Åse Daasvand [Show all 11 contributors for this article] (2021). Cognitive function, fatigue and Fazekas score in patients with acute neuroborreliosis. Ticks and Tick-borne Diseases. ISSN 1877-959X. 12(3), p. 1–5. doi: 10.1016/j.ttbdis.2021.101678. Full text in Research Archive
• Einstad, Marte Stine; Saltvedt, Ingvild; Lydersen, Stian; Ursin, Marie Helene; Munthe-Kaas, Ragnhild & Ihle-Hansen, Hege [Show all 13 contributors for this article] (2021). Associations between post-stroke motor and cognitive function: a cross-sectional study. BMC Geriatrics. ISSN 1471-2318. 21, p. 1–10. doi: 10.1186/s12877-021-02055-7. Full text in Research Archive Show summary

  Background: Motor and cognitive impairments are frequently observed following stroke, but are often managed as distinct entities, and there is little evidence regarding how they are related. The aim of this study was to describe the prevalence of concurrent motor and cognitive impairments 3 months after stroke and to examine how motor performance was associated with memory, executive function and global cognition. Methods: The Norwegian Cognitive Impairment After Stroke (Nor-COAST) study is a prospective multicentre cohort study including patients hospitalized with acute stroke between May 2015 and March 2017. The National Institutes of Health Stroke Scale (NIHSS) was used to measure stroke severity at admission. Level of disability was assessed by the Modified Rankin Scale (mRS). Motor and cognitive functions were assessed 3 months post-stroke using the Montreal Cognitive Assessment (MoCA), Trail Making Test Part B (TMT-B), 10-Word List Recall (10WLR), Short Physical Performance Battery (SPPB), dual-task cost (DTC) and grip strength (Jamar®). Cut-offs were set according to current recommendations. Associations were examined using linear regression with cognitive tests as dependent variables and motor domains as covariates, adjusted for age, sex, education and stroke severity. Results: Of 567 participants included, 242 (43%) were women, mean (SD) age was 72.2 (11.7) years, 416 (75%) had an NIHSS score ≤ 4 and 475 (84%) had an mRS score of ≤2. Prevalence of concurrent motor and cognitive impairment ranged from 9.5% for DTC and 10WLR to 22.9% for grip strength and TMT-B. SPPB was associated with MoCA (regression coefficient B = 0.465, 95%CI [0.352, 0.578]), TMT-B (B = -9.494, 95%CI [− 11.726, − 7.925]) and 10WLR (B = 0.132, 95%CI [0.054, 0.211]). Grip strength was associated with MoCA (B = 0.075, 95%CI [0.039, 0.112]), TMT-B (B = -1.972, 95%CI [− 2.672, − 1.272]) and 10WLR (B = 0.041, 95%CI [0.016, 0.066]). Higher DTC was associated with more time needed to complete TMT-B (B = 0.475, 95%CI [0.075, 0.875]) but not with MoCA or 10WLR.

• Wendel, Kristina; Pfeiffer, Helle Cecilie; Fugelseth, Drude; Nestaas, Eirik; Domellöf, Magnus & Skålhegg, Bjørn Steen [Show all 42 contributors for this article] (2021). Effects of nutrition therapy on growth, inflammation and metabolism in immature infants: a study protocol of a double-blind randomized controlled trial (ImNuT). BMC Pediatrics. ISSN 1471-2431. 21. doi: 10.1186/s12887-020-02425-x. Full text in Research Archive Show summary

  Background: Current nutritional management of infants born very preterm results in significant deficiency of the essential fatty acids (FAs) arachidonic acid (ARA) and docosahexaenoic acid (DHA). The impact of this deficit on brain maturation and inflammation mediated neonatal morbidities are unknown. The aim of this study is to determine whether early supply of ARA and DHA improves brain maturation and neonatal outcomes in infants born before 29 weeks of gestation. Methods: Infants born at Oslo University Hospital are eligible to participate in this double-blind randomized controlled trial. Study participants are randomized to receive an enteral FA supplement of either 0.4 ml/kg MCT-oil™ (medium chain triglycerides) or 0.4 ml/kg Formulaid™ (100 mg/kg of ARA and 50 mg/kg of DHA). The FA supplement is given from the second day of life to 36 weeks' postmenstrual age (PMA). The primary outcome is brain maturation assessed by Magnetic Resonance Imaging (MRI) at term equivalent age. Secondary outcomes include quality of growth, incidence of neonatal morbidities, cardiovascular health and neuro-development. Target sample size is 120 infants (60 per group), this will provide 80% power to detect a 0.04 difference in mean diffusivity (MD, mm2/sec) in major white matter tracts on MRI. Discussion: Supplementation of ARA and DHA has the potential to improve brain maturation and reduce inflammation related diseases. This study is expected to provide valuable information for future nutritional guidelines for preterm infants. Trial registration: Clinicaltrials.gov ID: NCT03555019 . Registered 4 October 2018- Retrospectively registered.

• Brune, Synne; Høgestøl, Einar August; Cengija, Vanja; Berg-Hansen, Pål; Sowa, Piotr & Nygaard, Gro Owren [Show all 8 contributors for this article] (2020). LesionQuant for assessment of MRI in multiple sclerosis—A promising supplement to the visual scan inspection. Frontiers in Neurology. ISSN 1664-2295. 11:546744, p. 1–10. doi: 10.3389/fneur.2020.546744. Full text in Research Archive
• Elvsåshagen, Torbjørn; Bahrami, Shahram; van der Meer, Dennis; Agartz, Ingrid; Alnæs, Dag & Barch, Deanna M. [Show all 76 contributors for this article] (2020). The genetic architecture of human brainstem structures and their involvement in common brain disorders. Nature Communications. ISSN 2041-1723. 11. doi: 10.1038/s41467-020-17376-1. Full text in Research Archive Show summary

  Brainstem regions support vital bodily functions, yet their genetic architectures and involvement in common brain disorders remain understudied. Here, using imaging-genetics data from a discovery sample of 27,034 individuals, we identify 45 brainstem-associated genetic loci, including the first linked to midbrain, pons, and medulla oblongata volumes, and map them to 305 genes. In a replication sample of 7432 participants most of the loci show the same effect direction and are significant at a nominal threshold. We detect genetic overlap between brainstem volumes and eight psychiatric and neurological disorders. In additional clinical data from 5062 individuals with common brain disorders and 11,257 healthy controls, we observe differential volume alterations in schizophrenia, bipolar disorder, multiple sclerosis, mild cognitive impairment, dementia, and Parkinson’s disease, supporting the relevance of brainstem regions and their genetic architectures in common brain disorders.

• Alme, Katinka Nordheim; Knapskog, Anne Brita; Næss, Halvor; Naik, Mala; Beyer, Mona K. & Ellekjær, Hanne [Show all 15 contributors for this article] (2020). Is long-bout sedentary behaviour associated with long-Term glucose levels 3 months after acute ischaemic stroke? A prospective observational cohort study. BMJ Open. ISSN 2044-6055. 10(11), p. 1–9. doi: 10.1136/bmjopen-2020-037475. Full text in Research Archive
• Munthe-Kaas, Ragnhild; Aam, Stina; Ihle-Hansen, Hege; Lydersen, Stian; Knapskog, Anne Brita & Wyller, Torgeir Bruun [Show all 15 contributors for this article] (2020). Impact of different methods defining post-stroke neurocognitive disorder: The Nor-COAST study. Alzheimer's and Dementia: Translational Research and Clinical Interventions. ISSN 2352-8737. 6:e12000(1), p. 1–9. doi: 10.1002/trc2.12000. Full text in Research Archive
• Tjensvoll, Anne Bolette; Lauvsnes, Maria Boge; Zetterberg, Henrik; Kvaløy, Jan Terje; Kvivik, Ingeborg & Maroni, Stian [Show all 15 contributors for this article] (2020). Neurofilament light is a biomarker of brain involvement in lupus and primary Sjögren’s syndrome. Journal of Neurology. ISSN 0340-5354. doi: 10.1007/s00415-020-10290-y. Full text in Research Archive
• Gynnild, Mari Nordbø; Aakerøy, Rachel; Spigset, Olav; Askim, Torunn; Beyer, Mona Kristiansen & Ihle-Hansen, Hege [Show all 15 contributors for this article] (2020). Vascular risk factor control and adherence to secondary preventive medication after ischaemic stroke. Journal of Internal Medicine. ISSN 0954-6820. p. 1–14. doi: 10.1111/joim.13161. Full text in Research Archive
• Hagberg, Guri; Ihle-Hansen, Hege; Fure, Brynjar; Thommessen, Bente; Ihle-Hansen, Håkon & Øksengård, Anne Rita [Show all 11 contributors for this article] (2020). No evidence for amyloid pathology as a key mediator of neurodegeneration post-stroke - A seven-year follow-up study. BMC Neurology. ISSN 1471-2377. 20, p. 1–11. doi: 10.1186/s12883-020-01753-w. Full text in Research Archive
• Hagberg, Guri; Fure, Brynjar; Thommessen, Bente; Ihle-Hansen, Håkon; Øksengård, Anne Rita & Nygård, Ståle [Show all 10 contributors for this article] (2019). Predictors for Favorable Cognitive Outcome Post-Stroke: A-Seven-Year Follow-Up Study. Dementia and Geriatric Cognitive Disorders. ISSN 1420-8008. p. 1–11. doi: 10.1159/000501850.
• Høgestøl, Einar August; Kaufmann, Tobias; Nygaard, Gro Owren; Beyer, Mona K.; Sowa, Piotr & Nordvik, Jan Egil [Show all 11 contributors for this article] (2019). Cross-sectional and longitudinal MRI brain scans reveal accelerated brain aging in multiple sclerosis. Frontiers in Neurology. ISSN 1664-2295. 10:450, p. 1–9. doi: 10.3389/fneur.2019.00450. Full text in Research Archive
• Kaufmann, Tobias; van der Meer, Dennis; Doan, Nhat Trung; Schwarz, Emanuel; Lund, Martina Jonette & Agartz, Ingrid [Show all 84 contributors for this article] (2019). Common brain disorders are associated with heritable patterns of apparent aging of the brain. Nature Neuroscience. ISSN 1097-6256. 22(10), p. 1617–1623. doi: 10.1038/s41593-019-0471-7. Full text in Research Archive
• Høgestøl, Einar August; Nygaard, Gro Owren; Alnæs, Dag; Beyer, Mona K.; Westlye, Lars Tjelta & Harbo, Hanne Flinstad (2019). Symptoms of fatigue and depression is reflected in altered default mode network connectivity in multiple sclerosis. PLOS ONE. ISSN 1932-6203. 14(4). doi: 10.1371/journal.pone.0210375. Full text in Research Archive
• Beyer, Mona K.; Dalaker, Turi Olene; Greve, Ole Jacob; Pignatiello, Siv Elin & Agartz, Ingrid (2018). A population study of Norwegian psychiatric patients referred for clinical brain scanning. BJPsych Open. ISSN 2056-4724. 4(3), p. 149–156. doi: 10.1192/bjo.2018.16. Full text in Research Archive
• Sowa, Piotr; Harbo, Hanne Flinstad; White, Nathan S.; Celius, Elisabeth Gulowsen; Bartsch, Hauke & Berg-Hansen, Pål [Show all 12 contributors for this article] (2018). Restriction spectrum imaging of white matter and its relation to neurological disability in multiple sclerosis. Multiple Sclerosis. ISSN 1352-4585. p. 1–12. doi: 10.1177/1352458518765671. Full text in Research Archive
• Thingstad, Pernille; Askim, Torunn; Beyer, Mona K.; Bråthen, Geir; Ellekjær, Hanne & Ihle-Hansen, Hege [Show all 13 contributors for this article] (2018). The Norwegian Cognitive impairment after stroke study (Nor-COAST): study protocol of a multicentre, prospective cohort study. BMC Neurology. ISSN 1471-2377. 18:193. doi: 10.1186/s12883-018-1198-x. Full text in Research Archive
• Lindland, Elisabeth Margrete Stokke; Solheim, Anne Marit; Andreassen, Silje; Paulsen, Else Quist; Eikeland, Randi & Ljøstad, Unn [Show all 12 contributors for this article] (2018). Imaging in Lyme neuroborreliosis. Insight into Imaging. ISSN 1869-4101. 9(5), p. 833–844. doi: 10.1007/s13244-018-0646-x. Full text in Research Archive
• Hammonds, Solveig Kristina; Lauvsnes, Maria Boge; Dalen, Ingvild; Beyer, Mona K.; Kurz, Kathinka Dæhli & Greve, Ole Jacob [Show all 8 contributors for this article] (2017). No structural cerebral MRI changes related to fatigue in patients with primary Sjögren’s syndrome. Rheumatology - Advances in Practice (Rheumap). ISSN 2514-1775. 1(1). doi: 10.1093/rap/rkx007. Show summary

  Objective Whether or not chronic fatigue is reflected in structural changes in the brain is a matter of debate. Primary SS (pSS) is characterized by dryness of the mouth and eyes, migrating muscle and joint pain and prominent fatigue. We aimed to investigate whether the severity of fatigue in pSS was associated with cerebral MRI findings. Methods Fatigue was measured with the fatigue visual analog scale in 65 patients with pSS. Global grey matter (GM) and white matter volumes were estimated from magnetic resonance T1 images, and associations between fatigue and brain volumes were assessed in regression models. Voxel-based morphometric analyses of GM were performed to investigate possible associations between fatigue and GM volume changes in particular brain regions. Results The fatigue scores in the patient group were spread across a wide range. Global volume analyses showed no significant effect of GM volumes and white matter volumes on fatigue. Voxel-wise analyses of GM did not identify any particular brain region associated with fatigue. Conclusion Fatigue is a dominant phenomenon in pSS patients but is not reflected in structural abnormalities in the brain as visualized by conventional MRI. Our findings support the hypothesis of fatigue as a physiological phenomenon that does not lead to vascular changes or neuronal or glial death or damage.

• Brix, Maiken Kirkegaard; Westman, Eric; Simmons, Andrew; Ringstad, Geir; Eide, Per Kristian & Wagner-Larsen, Kari Strøno [Show all 9 contributors for this article] (2017). The Evans' Index revisited: New cut-off levels for use in radiological assessment of ventricular enlargement in the elderly. European Journal of Radiology. ISSN 0720-048X. 95, p. 28–32. doi: 10.1016/j.ejrad.2017.07.013.
• Sowa, Piotr; Nygaard, Gro Owren; Bjørnerud, Atle; Celius, Elisabeth Gulowsen; Harbo, Hanne Flinstad & Beyer, Mona K. (2017). Magnetic resonance imaging perfusion is associated with disease severity and activity in multiple sclerosis. Neuroradiology. ISSN 0028-3940. 59(7), p. 655–664. doi: 10.1007/s00234-017-1849-4. Full text in Research Archive
• Brix, Maiken Kirkegaard; Ersland, Lars; Hugdahl, Kenneth; Dwyer, Gerard Eric; Grüner, Renate & Noeske, Ralph [Show all 8 contributors for this article] (2017). Within- and between-session reproducibility of GABA measurements with MR spectroscopy. Journal of Magnetic Resonance Imaging. ISSN 1053-1807. 46(2), p. 421–430. doi: 10.1002/jmri.25588.
• Lebedeva, Aleksandra K.; Westman, Eric; Borza, Tom; Beyer, Mona K.; Engedal, Knut & Aarsland, Dag [Show all 8 contributors for this article] (2017). MRI-based classification models in prediction of mild cognitive impairment and dementia in late-life depression. Frontiers in Aging Neuroscience. ISSN 1663-4365. 9:13, p. 1–11. doi: 10.3389/fnagi.2017.00013. Full text in Research Archive Show summary

  Objective: Late-life depression (LLD) is associated with development of different types of dementia. Identification of LLD patients, who will develop cognitive decline, i.e., the early stage of dementia would help to implement interventions earlier. The purpose of this study was to assess whether structural brain magnetic resonance imaging (MRI) in LLD patients can predict mild cognitive impairment (MCI) or dementia 1 year prior to the diagnosis. Methods: LLD patients underwent brain MRI at baseline and repeated clinical assessment after 1-year. Structural brain measurements were obtained using Freesurfer software (v. 5.1) from the T1W brain MRI images. MRI-based Random Forest classifier was used to discriminate between LLD who developed MCI or dementia after 1-year follow-up and cognitively stable LLD. Additionally, a previously established Random Forest model trained on 185 patients with Alzheimer’s disease (AD) vs. 225 cognitively normal elderly from the Alzheimer’s disease Neuroimaging Initiative was tested on the LLD data set (ADNI model). Results: MCI and dementia diagnoses were predicted in LLD patients with 76%/68%/84% accuracy/sensitivity/specificity. Adding the baseline Mini-Mental State Examination (MMSE) scores to the models improved accuracy/sensitivity/specificity to 81%/75%/86%. The best model predicted MCI status alone using MRI and baseline MMSE scores with accuracy/sensitivity/specificity of 89%/85%/90%. The most important region for all the models was right ventral diencephalon, including hypothalamus. Its volume correlated negatively with the number of depressive episodes. ADNI model trained on AD vs. Controls using SV could predict MCI-DEM patients with 67% accuracy. Conclusion: LDD patients developing MCI and dementia can be discriminated from LLD patients remaining cognitively stable with good accuracy based on baseline structural MRI alone. Baseline MMSE score improves prediction accuracy. Ventral diencephalon, including the hypothalamus might play an important role in preservation of cognitive functions in LLD.

• Oppedal, Ketil; Engan, Kjersti; Eftestøl, Trygve Christian; Beyer, Mona K. & Aarsland, Dag (2017). Classifying Alzheimer's disease, Lewy body dementia, and normal controls using 3D texture analysis in magnetic resonance images. Biomedical Signal Processing and Control. ISSN 1746-8094. 33, p. 19–29. doi: 10.1016/j.bspc.2016.10.007. Show summary

  Dementia is an evolving challenge in society and early intervention is important. The ability to distinguish between different dementia and non-dementia early in course may be essential for successful patient care. Magnetic resonance (MR) imaging may aid as a noninvasive method to increase prediction accuracy. In this work we explored the use of two different 3D local binary pattern (LBP) texture features extracted from T1 MR images of the brain combined with a random forest classifier in an attempt to discern patients with Alzheimer's disease (AD), Lewy body dementia (LBD), and normal controls (NC). Analysis were conducted in areas with white matter lesions (WML) and normal appearing white matter (NAWM). We also calculated correlations between texture features and cognition measured by mini mental state examination (MMSE) controlling for age. Additionally, two different methods for handling the imbalanced data problem were tested, namely cost-sensitive classification and resampling of the data using the synthetic minority oversampling technique (SMOTE). Four different classification tasks were extensively tested, a three-class problem: AD vs. LBD vs. NC, a two-class problem: NC vs. AD, a two-class problem NC vs. LBD, and a two-class problem: AD vs. LBD. Results from 10 folds nested cross validation are reported as mean accuracy, precision, and recall with standard deviation in brackets. The two-class problems NC vs. AD and NC vs. LBD, show encouraging results with total accuracy of 0.97 (0.07) and 0.97 (0.06) respectively. The three-class problem and the two-class problem AD vs. LBD are not equally encouraging but shows higher accuracy than clinical diagnosis with a total accuracy of 0.79 (0.07) and 0.79 (0.15) respectively. Possible explanations may be that the AD- and LBD group are too similar concerning LBP texture analysis and that the LBD group is too small. Most of the texture features calculated for the AD subjects in the NAWM region were significantly correlated with cognition. Together with the positive classification results from the NAWM region this may suggest that the NAWM region is an important area for studying AD. Both cost-sensitive classification and resampling using SMOTE proved useful and improved the results considerably in many of the tests.

• Persson, Karin; Selbæk, Geir; Brækhus, Anne; Beyer, Mona K.; Barca, Maria Lage & Engedal, Knut (2017). Fully automated structural MRI of the brain in clinical dementia workup. Acta Radiologica. ISSN 0284-1851. 58(6), p. 740–747. doi: 10.1177/0284185116669874.
• Keshavan, Anisha; Paul, Friedemann; Beyer, Mona K.; Zhu, Alyssa H.; Papinutto, Nico & Shinohara, Russell T. [Show all 56 contributors for this article] (2016). Power estimation for non-standardized multisite studies. NeuroImage. ISSN 1053-8119. 134, p. 281–294. doi: 10.1016/j.neuroimage.2016.03.051.
• Tjensvoll, Anne Bolette; Lauvsnes, Maria Boge; Hirohata, Shunsei; Beyer, Mona K.; Greve, Ole Jacob & Kvivik, Ingeborg [Show all 10 contributors for this article] (2016). Migraine in patients with systemic lupus erythematosus is associated with reduced cerebral grey matter volume but not with measures of glial activation or anti-NR2 or anti-P antibodies. European Journal of Neurology. ISSN 1351-5101. 23(4), p. 780–786. doi: 10.1111/ene.12946.
• Sowa, Piotr; Bjørnerud, Atle; Nygaard, Gro Owren; Damangir, Soheil; Spulber, Gabriela & Celius, Elisabeth Gulowsen [Show all 9 contributors for this article] (2015). Reduced perfusion in white matter lesions in multiple sclerosis. European Journal of Radiology. ISSN 0720-048X. 84(12), p. 2605–2612. doi: 10.1016/j.ejrad.2015.09.007.
• Lebedeva, Aleksandra; Borza, Tom; Håberg, Asta; Idland, Ane-Victoria; Dalaker, Turi Olene & Aarsland, Dag [Show all 8 contributors for this article] (2015). Neuroanatomical correlates of late-life depression and associated cognitive changes. Neurobiology of Aging. ISSN 0197-4580. 36(11), p. 3090–3099. doi: 10.1016/j.neurobiolaging.2015.04.020.
• Brix, Maiken Kirkegaard; Ersland, Lars; Hugdahl, Kenneth; Grüner, Renate; Posserud, Maj-Britt Rocio & Hammar, Åsa [Show all 12 contributors for this article] (2015). Brain MR spectroscopy in autism spectrum disorder—the GABA excitatory/inhibitory imbalance theory revisited. Frontiers in Human Neuroscience. ISSN 1662-5161. 9(365), p. 1–12. doi: 10.3389/fnhum.2015.00365. Full text in Research Archive
• Oppedal, Ketil; Eftestøl, Trygve; Engan, Kjersti; Beyer, Mona K. & Aarsland, Dag (2015). Classifying dementia using local binary patterns from different regions in magnetic resonance images. International Journal of Biomedical Imaging. ISSN 1687-4188. 2015. doi: 10.1155/2015/572567.
• Nygaard, Gro Owren; Walhovd, Kristine B; Sowa, Piotr; Chepkoech, Joy-Loi; Bjørnerud, Atle & Due-Tønnessen, Paulina [Show all 14 contributors for this article] (2015). Cortical thickness and surface area relate to specific symptoms in early relapsing−remitting multiple sclerosis. Multiple Sclerosis. ISSN 1352-4585. 21(4), p. 402–414. doi: 10.1177/1352458514543811.
• Lauvsnes, Maria Boge; Kristiansen Beyer, Mona; Appenzeller, Simone; Greve, Ole Jacob; Harboe, Erna & Gøransson, Lasse G [Show all 8 contributors for this article] (2014). Loss of cerebral white matter in primary Sjögren's syndrome: a controlled volumetric magnetic resonance imaging study. European Journal of Neurology. ISSN 1351-5101. 21(10), p. 1324–1329. doi: 10.1111/ene.12486.
• Lauvsnes, Maria Boge; Kristiansen Beyer, Mona; Kvaløy, Jan Terje; Greve, Ole Jacob; Appenzeller, Simone & Kvivik, Ingeborg [Show all 10 contributors for this article] (2014). Association of hippocampal atrophy with cerebrospinal fluid antibodies against the nr2 subtype of the N-methyl- D -aspartate receptor in patients with systemic lupus erythematosus and patients with primary Sjögren's syndrome. Arthritis and Rheumatism. ISSN 0004-3591. 66(12), p. 3387–3394. doi: 10.1002/art.38852.
• Lebedev, Alexander; Beyer, Mona Kristiansen; Fritze, Friederike; Westman, Eric; Ballard, Clive & Aarsland, Dag (2014). Cortical Changes Associated with Depression and Antidepressant Use in Alzheimer and Lewy Body Dementia: An MRI Surface-based Morphometric Study. The American journal of geriatric psychiatry. ISSN 1064-7481. 22(1), p. 4–13. doi: 10.1016/j.jagp.2013.02.004.
• Beyer, Mona Kristiansen; Brønnick, Kolbjørn S; Hwang, Kristy S.; Bergsland, Niels; Tysnes, Ole-Bjørn & Larsen, Jan Petter [Show all 9 contributors for this article] (2013). Verbal memory is associated with structural hippocampal changes in newly diagnosed Parkinson's disease. Journal of Neurology, Neurosurgery and Psychiatry. ISSN 0022-3050. 84(1), p. 23–28. doi: 10.1136/jnnp-2012-303054.
• Beyer, Mona Kristiansen; Dalaker, Turi Olene & Apostolova, Liana G. (2013). Imaging and behavior in Parkinson’s disease: structural imaging, Neuropsychiatric and Cognitive Changes in Parkinson’s Disease and Related Movement Disorders: Diagnosis and Management. Cambridge University Press. ISSN 9781107039223. p. 73–88.
• Boge, Maria; Maroni, Stian; Appenzeller, Simone; Beyer, Mona Kristiansen; Greve, Ole Jacob & Kvaløy, Jan Terje [Show all 10 contributors for this article] (2013). Memory dysfunction in Primary Sjögren’s Syndrome is associated with anti-NR2 antibodies. Arthritis and Rheumatism. ISSN 0004-3591. 65(12), p. 3209–3217. doi: 10.1002/art.38127.
• Hwang, Kristy S.; Beyer, Mona Kristiansen; Green, Amiyy E.; Chung, Christine; Thompson, Paul M. & Janvin, Carmen Cristea [Show all 9 contributors for this article] (2013). Mapping Cortical Atrophy in Parkinson's Disease Patients with Dementia. Journal of Parkinson's Disease. ISSN 1877-7171. 3(1), p. 69–76. doi: 10.3233/JPD-120151.
• Lebedev, Alexander; Westman, E.; Beyer, Mona Kristiansen; Kramberger, M.G.; Aguilar, C. & Pirtosek, Z. [Show all 7 contributors for this article] (2013). Multivariate classification of patients with Alzheimer's and dementia with Lewy bodies using high-dimensional cortical thickness measurements: an MRI surface-based morphometric study. Journal of Neurology. ISSN 0340-5354. 260(4), p. 1104–1115. doi: 10.1007/s00415-012-6768-z.
• Alves, Guido; Pedersen, Kenn Freddy; Bloem, Bastiaan R.; Blennow, Kaj; Zetterberg, Henrik & Borm, George F. [Show all 14 contributors for this article] (2013). Cerebrospinal fluid amyloid-beta and phenotypic heterogeneity in de novo Parkinson's disease. Journal of Neurology, Neurosurgery and Psychiatry. ISSN 0022-3050. 84(5), p. 537–543. doi: 10.1136/jnnp-2012-303808.
• Beyer, Mona Kristiansen; Alves, Guido; Hwang, Kristy S.; Babakchanian, Sona; Brønnick, Kolbjørn S & Chou, Yi-Yu [Show all 13 contributors for this article] (2013). Cerebrospinal fluid A levels correlate with structural brain changes in Parkinson's disease. Movement Disorders. ISSN 0885-3185. 28(3), p. 302–310. doi: 10.1002/mds.25282.
• Siepel, Françoise; Rongve, Arvid; Buter, Tirza; Beyer, Mona Kristiansen; Ballard, Clive G. & Booij, Jan [Show all 7 contributors for this article] (2013). (123I)FP-CIT SPECT in suspected dementia with Lewy bodies: a longitudinal case study. BMJ Open. ISSN 2044-6055. 3(4). doi: 10.1136/bmjopen-2013-002642.
• Tjensvoll, Anne Bolette; Harboe, Erna; Gøransson, Lasse G; Beyer, Mona Kristiansen; Greve, Ole Jacob & Kvaløy, Jan Terje [Show all 7 contributors for this article] (2013). Headache in primary Sjøgren's syndrome: a population-based retrospective cohort study. European Journal of Neurology. ISSN 1351-5101. 20(3), p. 558–563. doi: 10.1111/ene.12033.
• Oppedal, Ketil; Engan, Kjersti; Aarsland, Dag; Beyer, Mona Kristiansen; Tysnes, Ole-Bjørn & Eftestøl, Trygve (2012). Using local binary pattern to classify dementia in MRI. In 9th IEEE, . (Eds.), 2012 9th IEEE International Symposium on Biomedical Imaging: From Nano to Macro. IEEE Signal Processing Society. ISSN 978-1-4577-1858-8. p. 594–597.
• Sønnesyn, Hogne; Nilsen, Dennis W.T.; Oppedal, Ketil; Greve, Ole Jacob; Beyer, Mona Kristiansen & Aarsland, Dag (2012). Relationship between orthostatic hypotension and white matter hyperintensity load in older patients with mild dementia. PLOS ONE. ISSN 1932-6203. 7(12). doi: 10.1371/journal.pone.0052196. Show summary

  Background/Objectives White matter hyperintensities (WMH) in magnetic resonance imaging (MRI) scans of the brain, and orthostatic hypotension (OH) are both common in older people. We tested the hypothesis that OH is associated with WMH. Design Cross-sectional study. Setting Secondary care outpatient clinics in geriatric medicine and old age psychiatry in western Norway. Participants 160 older patients with mild dementia, diagnosed according to standardised criteria. Measurements OH was diagnosed according to the consensus definition, measuring blood pressure (BP) in the supine position and within 3 minutes in the standing position. MRI scans were performed according to a common protocol at three centres, and the volumes of WMH were quantified using an automated method (n = 82), followed by manual editing. WMH were also quantified using the visual Scheltens scale (n = 139). Multiple logistic regression analyses were applied, with highest vs. lowest WMH quartile as response. Results There were no significant correlations between WMH volumes and systolic or diastolic orthostatic BP drops, and no significant correlations between Scheltens scores of WMH and systolic or diastolic BP drops. In the multivariate analyses, only APOEε4 status remained a significant predictor for WMH using the automated method (p = 0.037, OR 0.075 (0.007–0.851)), whereas only age remained a significant predictor for WMH scores (p = 0.019, OR 1.119 (1.018–1.230)). Conclusion We found no association between OH and WMH load in a sample of older patients with mild dementia.

• Apostolova, Liana G.; Alves, Guido; Hwang, Kristy S.; Babakchanian, Sona; Brønnick, Kolbjørn S & Larsen, Jan Petter [Show all 11 contributors for this article] (2012). Hippocampal and ventricular changes in Parkinson's disease mild cognitive impairment. Neurobiology of Aging. ISSN 0197-4580. 33(9), p. 2113–2124. doi: 10.1016/j.neurobiolaging.2011.06.014.
• Chow, Nicole; Aarsland, Dag; Honarpisheh, Hedieh; Beyer, Mona Kristiansen; Somme, Johanne H. & Elashoff, David [Show all 10 contributors for this article] (2012). Comparing Hippocampal Atrophy in Alzheimer's Dementia and Dementia with Lewy Bodies. Dementia and Geriatric Cognitive Disorders. ISSN 1420-8008. 34(1), p. 44–50. doi: 10.1159/000339727. Show summary

  Background/Aims: Dementia with Lewy bodies (DLB) and Alzheimer's disease (AD) are the two most common neurodegenerative dementias. During the early stages, clinical distinction between them is often challenging. Our objective is to compare hippocampal atrophy patterns in mild AD and mild DLB. We hypothesized that DLB subjects have milder hippocampal atrophy relative to AD subjects. Methods: We analyzed the T1-weighted magnetic resonance imaging data from 113 subjects: 55 AD, 16 DLB and 42 cognitively normal elderly (normal controls, NC). Using the hippocampal radial distance technique and multiple linear regression, we analyzed the effect of clinical diagnosis on hippocampal radial distance, while adjusting for gender and age. Three-dimensional statistical maps were adjusted for multiple comparisons using permutation-based statistics with a threshold of p < 0.01. Results: Compared to NC, AD exhibited significantly greater atrophy in the cornu ammonis (CA)1, CA2-3 and subicular regions bilaterally while DLB showed left-predominant atrophy in the CA1 region and subiculum. Compared directly, AD and DLB did not reveal statistically significant differences. Conclusion: Hippocampal atrophy, while present in mildly impaired DLB subjects, is less severe than atrophy seen in mildly impaired AD subjects, when compared to NC. Both groups show predominant atrophy of the CA1 subfield and subiculum.

• Hugdahl, Kenneth; Beyer, Mona Kristiansen; Brix, Maiken Kirkegaard & Ersland, Lars (2012). Autism spectrum disorder, functional MRI and MR spectroscopy: possibilities and challenges. Microbial Ecology in Health and Disease. ISSN 0891-060X. 23. doi: 10.3402/mehd.v23i0.18960.
• Oppedal, Ketil; Aarsland, Dag; Firbank, Michael J.; Sønnesyn, Hogne; Tysnes, Ole-Bjørn & O'Brien, J.T. [Show all 7 contributors for this article] (2012). White Matter Hyperintensities in Mild Lewy Body Dementia. Dementia and Geriatric Cognitive Disorders Extra. ISSN 1664-5464. p. 481–495. doi: 10.1159/000343480.
• Soennesyn, Hogne; Oppedal, Ketil; Greve, Ole Jacob; Fritze, Friedrike; Auestad, Bjørn Henrik & Nore, Sabine [Show all 8 contributors for this article] (2012). White Matter Hyperintensities and the Course of Depressive Symptoms in Elderly People with Mild Dementia. Dementia and Geriatric Cognitive Disorders Extra. ISSN 1664-5464. 2(1), p. 97–111. doi: 10.1159/000335497.
• Damangir, Soheil; Manzouri, Amirhossein; Oppedal, Ketil; Carlsson, Stefan; Firbank, Michael J. & Sønnesyn, Hogne [Show all 13 contributors for this article] (2012). Multispectral MRI segmentation of age related white matter changes using a cascade of support vector machines. Journal of the Neurological Sciences. ISSN 0022-510X. 322(1-2), p. 211–216. doi: 10.1016/j.jns.2012.07.064.
• Dalaker, Turi Olene; Zivadinov, Robert; Ramasamy, Deepa Preeti; Beyer, Mona Kristiansen; Alves, Guido & Brønnick, Kolbjørn S [Show all 9 contributors for this article] (2011). Ventricular enlargement and mild cognitive impairment in early Parkinson's Disease. Movement Disorders. ISSN 0885-3185. 26(2), p. 297–301. doi: 10.1002/mds23443.
• Tjensvoll, Anne Bolette; Harboe, Erna; Gøransson, Lasse; Beyer, Mona K.; Greve, Ole Jacob & Herigstad, Anita [Show all 8 contributors for this article] (2011). Migraine is frequent in patients with systemic lupus erythematosus: A case-control study. Cephalalgia. ISSN 0333-1024. 31(4), p. 401–408. doi: 10.1177/0333102410372428.
• Apostolova, Liana G.; Beyer, Mona Kristiansen; Green, Amiyy E.; Hwang, Kristy S.; Morra, Jonathan H. & Chou, Yi-Yu [Show all 12 contributors for this article] (2010). Hippocampal, caudate, and ventricular changes in Parkinson's disease with and without dementia. Movement Disorders. ISSN 0885-3185. 25(6), p. 687–695. doi: 10.1002/mds.22799.
• Dalaker, Turi Olene; Zivadinov, Robert; Larsen, Jan Petter; Beyer, Mona Kristiansen; Cox, Jennifer L. & Alves, Guido [Show all 11 contributors for this article] (2010). Gray matter correlations of cognition in incident Parkinson's disease. Movement Disorders. ISSN 0885-3185. 25(5), p. 629–633. doi: 10.1002/mds.22867.

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• Lauvsnes, Maria Boge; Zetterberg, Henrik; Blennow, Kaj; Kvaløy, Jan Terje; Tjensvoll, Anne Bolette & Maroni, Stian [Show all 14 contributors for this article] (2024). Correction to: Neurofilament light in plasma is a potential biomarker of central nervous system involvement in systemic lupus erythematosus (Journal of Neurology, (2022), 269, 6, (3064-3074), 10.1007/s00415-021-10893-z). Journal of Neurology. ISSN 0340-5354. doi: 10.1007/s00415-024-12238-y.
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• Einstad, Marte Stine; SCHELLHORN, TILL; Thingstad, Pernille; Lydersen, Stian; Aamodt, Eva Birgitte & Beyer, Mona K. [Show all 8 contributors for this article] (2022). Neuroimaging Markers of Dual Impairment in Cognition and Physical Performance Following Stroke: The Norwegian Cognitive Impairment After Stroke (Nor-COAST) Study .
• Kaufmann, Tobias; van der Meer, Dennis; Doan, Nhat Trung; Schwarz, Emanuel; Lund, Martina Jonette & Agartz, Ingrid [Show all 97 contributors for this article] (2020). Publisher Correction: Common brain disorders are associated with heritable patterns of apparent aging of the brain (Nature Neuroscience, (2019), 22, 10, (1617-1623), 10.1038/s41593-019-0471-7). Nature Neuroscience. ISSN 1097-6256. 23(2). doi: 10.1038/s41593-019-0553-6.
• Munthe-Kaas, Ragnhild; Aam, Stina; Saltvedt, Ingvild; Thingstad, Pernille; Askim, Torunn & Beyer, Mona K. [Show all 14 contributors for this article] (2018). The burden of post-stroke cognitive impairments in a Norwegian stroke population (Nor-COAST).
• Abildgaard, Andreas; Hopp, Einar; Sakinis, Tomas; Roterud, Håvard; Bjørnerud, Atle & Beyer, Mona K. [Show all 7 contributors for this article] (2018). Vil radiologer bli erstattet av kunstig intelligens? Tidsskrift for Den norske legeforening. ISSN 0029-2001. 138(17). doi: 10.4045/tidsskr.18.0587.
• Leikfoss, Ingvild Sørum; Bos, Steffan Daniel; Berg-Hansen, Pål; Berge, Tone; Beyer, Mona K. & Celius, Elisabeth Gulowsen [Show all 8 contributors for this article] (2018). The EU Horizon2020 Project MultipleMS: Improved Personalized Medicine for Multiple Sclerosis .
• SCHELLHORN, TILL; Håberg, Asta; Nakken, Ingeborg Elise & Beyer, Mona K. (2017). MRI-reliability based on human phantom scans in "The Norwegian Cognitive impairment after stroke" (Nor-COAST) study.
• SCHELLHORN, TILL; Thingstad, Pernille; Wyller, Torgeir Bruun; Saltvedt, Ingvild & Beyer, Mona K. (2017). Imaging in the NorCoast study: A multicentre, prospective cohort study on cognitive function following acute stroke.
• Moen, Stine Marit; Harbo, Hanne Flinstad; Celius, Elisabeth Gulowsen; Sowa, Piotr; Nygaard, Gro Owren & Beyer, Mona K. (2016). S.M. Moen og medarbeidere svarer. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 136(19), p. 1608–1608. doi: 10.4045/tidsskr.16.0826.
• Moen, Stine Marit; Harbo, Hanne Flinstad; Celius, Elisabeth Gulowsen; Sowa, Piotr; Nygaard, Gro Owren & Beyer, Mona K. (2016). S.M. Moen og medarbeidere svarer. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 136(20), p. 1702–1702. doi: 10.4045/tidsskr.16.0865.
• Moen, Stine Marit; Harbo, Hanne Flinstad; Sowa, Piotr; Celius, Elisabeth Gulowsen; Nygaard, Gro Owren & Beyer, Mona K. (2016). MR-undersøkelser ved multippel sklerose. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 136(16), p. 1373–1376. doi: 10.4045/tidsskr.15.1361.
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• Lebedeva, Aleksandra; Eric, Westman; Borza, Tom; Beyer, Mona K.; Engedal, Knut & Aarsland, Dag [Show all 8 contributors for this article] (2016). Early identification of patients who develop mild cognitive impairment and dementia among depressed elderly using structural brain measurements obtained one year prior .
• Ellekjær, Hanne; Askim, Torunn; Indredavik, Bent; Thingstad, Pernille; Engstad, Torgeir & Næss, Halvor [Show all 10 contributors for this article] (2016). The Norwegian Cognitive impairement after stroke (Nor-COAST study.
• Saltvedt, Ingvild; Askim, Torunn; Engstad, Torgeir; Fure, Brynjar; Ihle-Hansen, Hege & Næss, Halvor [Show all 8 contributors for this article] (2015). Norwegian Cognitive Impairment After Stroke Study (Nor-COAST).
• Lauvsnes, Maria Boge; Greve, Ole Jacob; Kvivik, Ingeborg; Harboe, Erna; Tjensvoll, Anne Bolette & Beyer, Mona K. [Show all 10 contributors for this article] (2015). Reply. Arthritis & Rheumatology. ISSN 2326-5191. 67(6), p. 1683–1684. doi: 10.1002/art.39076.
• Oppedal, Ketil; Engan, Kjersti; Aarsland, Dag; Beyer, Mona Kristiansen; Tysnes, Ole-Bjørn & Eftestøl, Trygve (2012). Using local binary pattern to classify dementia in MRI.
• Lebedev, A. V.; Beyer, Mona Kristiansen; Fritze, Friedrike; Westman, Eric & Aarsland, Dag (2012). CORTICAL CHANGES ASSOCIATED WITH DEPRESSION IN ALZHEIMER'S DISEASE: AN MRI SURFACE-BASED MORPHOMETRIC STUDY. European psychiatry. ISSN 0924-9338. 27.
• Lebedev, A. V.; Westman, E.; Beyer, Mona Kristiansen; Kramberger, M.G.; Aguilar, C. & Aarsland, Dag (2012). Robust multivariate classification of surface-based cortical thickness measurements from patients with Alzheimer's and Lewy body dementia: a two-cohort study. European Journal of Neurology. ISSN 1351-5101. 19, p. 76–76.
• Brix, Maiken Kirkegaard; Beyer, Mona K.; Ersland, Lars & Hugdahl, Kenneth (2018). Establishing reliable MR spectroscopy techniques for measuring GABA and Glutathione in the human brain . Universitetet i Bergen. ISSN 978-82-308-3765-8.
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