Predicting neuropsychological abnormalities in multiple sclerosis
ABSTRACT Multiple Sclerosis (MS) is associated with MRI signal alteration and neuropsychological (NP) dysfunction. Screening tools have been developed to identify patients at high risk for these neurological complications of MS. One such measure, the Multiple Sclerosis Neuropsychological Screening Questionnaire (MSNQ), has well-established reliability and predictive validity. In this article, we report on the accumulated findings derived from 162 consecutive research participants and MS clinic attendees. Our data show significant correlation between both patient- and informant-report MSNQ and NP impairment. As shown previously, larger, and more significant correlations are found between informant-report MSNQs than with patient-report MSNQs. In addition, we find that the MSNQ predicts follow-up NP testing 51 weeks after baseline with a similar degree of association. Finally, the MSNQ is correlated with MRI measures of whole-brain lesion burden and atrophy, secondary progressive course, and vocational disability. We conclude that the MSNQ is reliable and valid for detecting neuropsychological and neuropsychiatric complications of MS.
SourceAvailable from: Fatemeh Ayoobi[Show abstract] [Hide abstract]
ABSTRACT: The purpose of this study was to assess tactile learning in the early phase of experimental autoimmune encephalomyelitis (EAE), which was induced in C57BL/6 mice by subcutaneous injections on flank of myelin oligodendrocyte glycoprotein, MOG35-55 (250 μg per mouse). Tactile learning was assessed one week after EAE induction using the novel object recognition test (NORT) in a dark room. The procedure consisted of two phases. During the training phase (T1), the animals explored two similar objects; within the test phase (T2, occurring 4 h later) the mice explored one novel and one familiar object. On average, mice developed significant behavioral disabilities related to EAE 13.2 ± 1.9 days following immunization. In the EAE group, the locomotor activity level (assessed by measuring the distance travelled) in the T1 and T2 phases did not differ significantly, as compared to the related phases in the control group (P > 0.05). Within phase T1, no reliable differences between experimental groups were found for the frequency (number) of visits to the sample objects and for total exploration time. For phase T2, no difference was also found in the discrimination ratio when comparing the control group with the EAE group. Our study demonstrates that tactile learning in male mice may not be affected 7 days after immunization with MOG35-55 (i.e., within the early EAE phase).Neurophysiology 07/2013; 45(4). DOI:10.1007/s11062-013-9373-6 · 0.17 Impact Factor
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ABSTRACT: Background and Purpose. Fatigue and memory impairment are common symptoms in multiple sclerosis (MS) and both may interact with cognition. This can contribute to making a complaint misrepresentative of the objective disorder. We sought to determine whether fatigue complaint in MS reflects memory impairment and investigated whether patients' subjective fatigue is associated with memory complaint. Methods. Fifty MS patients complaining of fatigue underwent subjective assessment of fatigue and memory complaint measured using self-assessment scales. Cognitive functions were assessed using a battery of neuropsychological tests, including a test of verbal episodic memory, the selective reminding test (SRT). Correlations were studied between subjective fatigue, memory complaint, and performance in verbal episodic memory. Results. Depression score, psychotropic and/or antiepileptic drug use, Expanded Disability Status Scale (EDSS) score, and MS form were confounding factors. After adjusting for these confounding factors, neither fatigue complaint nor memory complaint was correlated with SRT performance. Subjective fatigue was significantly associated with memory complaint. Conclusion. Although complaint of fatigue in MS was correlated with memory complaint, subjective fatigue was not the expression of memory impairment.03/2014; 2014:692468. DOI:10.1155/2014/692468
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ABSTRACT: Eighty-two persons with multiple sclerosis wore an accelerometer as a measure of sedentary time (min/day) and completed measures of disability status (self-reported Expanded Disability Status Scale), walking performance (timed 25-foot walk and 6-min walk), and cognitive function (symbol digit modalities test). Accelerometry-measured sedentary time was significantly correlated with disability status scores (r = 0.31, p < 0.01), 6-min walk distance (r = -0.40, p < 0.01), and timed 25-foot walk performance (r = 0.35, p < 0.01), but not cognitive function performance (r = -0.12, p = 0.29).Applied Physiology Nutrition and Metabolism 10/2014; 40(2):1-4. DOI:10.1139/apnm-2014-0271 · 2.23 Impact Factor