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Multiple Sclerosis l: Introduction01:19

Multiple Sclerosis l: Introduction

Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...

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Upper and lower extremity motor function and cognitive impairment in multiple sclerosis.

Ralph H B Benedict1, Roee Holtzer, Robert W Motl

  • 1Department of Neurology, SUNY Buffalo School of Medicine, Buffalo, NY, USA. benedict@buffalo.edu

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Cognitive functions like processing speed and executive function significantly predict motor skills in multiple sclerosis (MS) patients. This highlights the crucial role of cognitive control in MS motor impairments.

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Area of Science:

  • Neuroscience
  • Neurology
  • Rehabilitation Science

Background:

  • Multiple sclerosis (MS) frequently causes motor impairments and cognitive dysfunction.
  • Understanding the interplay between cognition and motor function is vital for MS management.

Purpose of the Study:

  • To investigate the relationship between cognitive capacity and motor function (upper and lower limb) in individuals with MS.
  • To compare these relationships in MS patients versus healthy controls.

Main Methods:

  • 211 MS patients and 120 healthy volunteers were assessed.
  • Motor function evaluated using Timed 25 Foot Walk (T25FW) and Nine Hole Peg Test (NHPT).
  • Neuropsychological testing assessed cognitive performance; hierarchical linear regression analyzed relationships.

Main Results:

  • Healthy subjects outperformed MS patients on all measures.
  • Processing speed and executive function significantly predicted motor function in both groups.
  • Cognitive predictors of motor function were stronger in the MS group, even after controlling for disease duration and disability.

Conclusions:

  • Evidence suggests higher-order cognitive control significantly influences motor function in MS.
  • Findings may inform risk assessment and treatment strategies for mobility issues in MS.
  • Cognitive-motor links are particularly pronounced in this MS cohort.