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Cognition in patients with multiple sclerosis After four years
A Jennekens-Schinkel1, P M Laboyrie, J B Lanser
1Neuropsychology Section, University Leiden, The Netherlands.
Journal of the Neurological Sciences
|November 1, 1990
Summary
Multiple sclerosis (MS) patients show persistent cognitive deficits in motor speed and reaction time over four years. However, overall cognition remained stable for most patients, with varied individual cognitive trajectories.
Area of Science:
- Neuroscience
- Clinical Neurology
- Cognitive Psychology
Background:
- Multiple sclerosis (MS) is a chronic neurological disease affecting cognitive functions.
- Previous assessments indicated cognitive impairments in MS patients, particularly in processing speed and attention.
Purpose of the Study:
- To conduct a 4-year follow-up assessment of cognitive functioning in MS patients.
- To identify patterns of cognitive change and stability over time in individuals with MS.
Main Methods:
- Longitudinal study involving 33 MS patients and 18 healthy controls.
- Cognitive assessment included measures of motor speed, reaction time, learning, reading, figure copying, visuospatial problem-solving, and behavioral flexibility.
Main Results:
- MS patients consistently demonstrated significantly slower motor speed and reaction times compared to controls.
- Cognitive domains such as visuospatial problem-solving and linguistic abilities did not differentiate between groups.
- Cognition remained largely undisturbed in 76% of MS patients, with individual trajectories showing improvement, stability, or deterioration.
Conclusions:
- Cognitive deficits in MS are primarily related to psychomotor speed and processing efficiency.
- The influence of motor impairment on cognitive task performance, especially under time constraints, is significant.
- Cognitive decline in MS is not uniform; individual variability in cognitive trajectories is a key characteristic.