Alteration profile of executive functions in multiple sclerosis

Area of Science:

• Neuroscience
• Cognitive Psychology
• Clinical Neurology

Background:

• Executive functions (EF) are crucial for daily functioning but are often overlooked in multiple sclerosis (MS) research.
• Previous studies have only partially investigated EF in MS, focusing on sub-functions.

Purpose of the Study:

• To comprehensively analyze the executive function alteration profile in a sample of patients with multiple sclerosis (MS).
• To identify specific patterns of EF deficits and their relationship with clinical variables in MS.

Main Methods:

• A case-control study involving 100 MS patients and 30 controls.
• Utilized a battery of neuropsychological tests including the Comprehensive Trail Making Test, Stroop Test, and Wisconsin Card Sorting Test.
• Employed factorial analysis, multiple regression, and ANOVA to analyze EF deficits and their clinical correlates.

Main Results:

• 85% of MS patients showed alterations in at least 3 EF tests, and 71% in 5 or more.
• Factorial analysis identified three core deficit areas: cognitive flexibility, inhibition, and abstraction ability.
• Patients with progressive MS and higher Expanded Disability Status Scale (EDSS) scores exhibited significantly worse performance.

Conclusions:

• Cognitive flexibility, inhibition, and abstraction are the most affected executive functions in multiple sclerosis.
• Progressive MS subtypes and greater disability are associated with more severe executive function impairments.
• MS patients demonstrated limited self-awareness regarding their executive function deficits.