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Multiple Sclerosis l: Introduction01:19

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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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Gender-related differences in functional connectivity in multiple sclerosis.

Menno M Schoonheim1, Hanneke E Hulst, Doriana Landi

  • 1Department of Radiology, VU University Medical Center, Amsterdam, The Netherlands. m.schoonheim@vumc.nl

Multiple Sclerosis (Houndmills, Basingstoke, England)
|September 13, 2011
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Male multiple sclerosis (MS) patients exhibit reduced brain functional connectivity and network efficiency, correlating with impaired visuospatial memory. These gender-specific findings highlight the importance of sex in MS progression and cognitive function.

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Neurology

Background:

  • Multiple sclerosis (MS) demonstrates significant gender disparities, with males typically experiencing poorer clinical outcomes compared to females.
  • Functional neural reorganization may mitigate disability in MS, and potential gender differences in this process carry clinical importance.

Purpose of the Study:

  • To investigate gender-specific alterations in functional connectivity and network efficiency in multiple sclerosis (MS) patients.
  • To examine the relationship between these functional brain changes and cognitive performance in MS.

Main Methods:

  • A study involving 60 participants matched for age, education, and IQ, with male and female MS patients matched for disability, disease duration, and lesion load.
  • Assessment of visuospatial memory and information processing speed, alongside resting-state functional magnetic resonance imaging (fMRI) and graph analysis to evaluate functional connectivity and network efficiency.
  • Statistical analysis to compare cognitive and functional characteristics between groups and explore correlations with cognitive outcomes.

Main Results:

  • Male MS patients performed worse on cognitive tests than female patients and controls; female patients maintained normal cognition.
  • Reduced functional connectivity and network efficiency were observed in male MS patients, correlating with deficits in visuospatial memory (r = -0.6 and r = -0.5).
  • Healthy male and female controls showed no cognitive differences, despite distinct functional connectivity patterns between genders.

Conclusions:

  • Functional connectivity alterations were identified exclusively in male MS patients and were linked to impaired visuospatial memory.
  • These findings underscore the critical role of gender in the clinical presentation and progression of MS.
  • Further research with larger, longitudinal cohorts is warranted to validate these gender-specific observations in MS.