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Related Concept Videos

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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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Information processing speed impairment and cerebellar dysfunction in relapsing-remitting multiple sclerosis.

Aurélie Ruet1, Delphine Hamel2, Mathilde S A Deloire1

  • 1Service de Neurologie, CHU de Bordeaux, F-33076 Bordeaux, France; INSERM-CHU CIC-P 0005, CHU de Bordeaux, F-33076 Bordeaux, France.

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Summary

In persons with multiple sclerosis, impaired information processing speed (IPS) is linked to motor deficits affecting cerebellar function. The Nine-Hole Peg Test (NHPT) revealed this correlation, highlighting the connection between cognitive and motor symptoms.

Keywords:
CerebellumCognitionInformation processing speedMultiple sclerosisNeuropsychology

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Area of Science:

  • Neuroscience
  • Clinical Neurology
  • Cognitive Science

Background:

  • Multiple Sclerosis (MS) is a chronic neurological disease affecting the central nervous system.
  • Cognitive impairment, particularly in information processing speed (IPS), is common in persons with MS (PwMS).
  • Cerebellar dysfunction significantly impacts motor control and can be assessed through specific functional tests.

Purpose of the Study:

  • To investigate the relationship between impaired information processing speed (IPS) and motor function related to cerebellar integrity in PwMS.
  • To determine if motor deficits assessed by the Nine-Hole Peg Test (NHPT) correlate with cognitive impairments in PwMS.

Main Methods:

  • A cross-sectional study involving 60 persons with relapsing-remitting MS.
  • Assessment of motor cerebellar function using the Nine-Hole Peg Test (NHPT) and Kurtzke Functional Status Scales.
  • Evaluation of cognitive domains including IPS, working memory, episodic memory, attention, and executive function, with correlation analyses.

Main Results:

  • The NHPT and IPS tests effectively distinguished PwMS with and without cerebellar impairment.
  • A significant correlation was found between the NHPT total score and measures of IPS.
  • Multivariate analyses confirmed the association between NHPT scores and IPS, but not with other cognitive tests lacking a speed component.

Conclusions:

  • Motor cerebellar impairment, as measured by the NHPT, is associated with impaired information processing speed in persons with multiple sclerosis.
  • This finding underscores the interconnectedness of motor and cognitive deficits in MS, particularly involving cerebellar pathways and processing speed.