Abstract:
:Fatigue is a common symptom of multiple sclerosis (MS) even in the early phases of the disease, when neurological disability is usually still not present. To investigate the pathophysiology of fatigue we compared neurophysiological (motor evoked potentials of the four limbs, MEPs) and brain magnetic resonance imaging (MRI) findings in two groups of nondisabled MS patients, those with (n=15) and those without (n=15) fatigue. Fatigue was assessed by an interview and scored by the Fatigue Severity Scale. The two groups were matched for sex, age, disease duration, Expanded Disability Status Scale score, pyramidal Functional System (FS) score, and depression score. MEPs were abnormal in five patients with fatigue and in one patient without fatigue. A significant association was found between the patient scores on the Fatigue Severity Scale, and the burden of MRI lesions (r=0.5; P< 0.005). Significantly higher parietal lobe (P< 0.05), internal capsule (P< 0.05), and periventricular trigone (P< 0.05) lesion loads were found in patients with fatigue than in those without. Our results agree with a central nervous system origin of fatigue in MS patients. This symptom might be a consequence either of a functional deafferentation of the cortex due to cortico-subcortical interconnection damage or of a demyelination in critical sites of the CNS, such as the cortico-spinal tract.
journal_name
J Neuroljournal_title
Journal of neurologyauthors
Colombo B,Martinelli Boneschi F,Rossi P,Rovaris M,Maderna L,Filippi M,Comi Gdoi
10.1007/s004150070148keywords:
subject
Has Abstractpub_date
2000-07-01 00:00:00pages
506-9issue
7eissn
0340-5354issn
1432-1459journal_volume
247pub_type
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