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09:41
Comprehensive Autopsy Program for Individuals with Multiple Sclerosis
Published on: July 19, 2019
Callosal atrophy in multiple sclerosis is related to cognitive speed
G Bergendal1, J Martola, L Stawiarz
1Division of Alzheimer Neurobiology center, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden. gosta.bergendal@karolinska.se
Acta Neurologica Scandinavica
|September 20, 2012
Summary
Corpus callosum area (CCA) changes in multiple sclerosis (MS) are linked to slower cognitive processing speed, particularly the Symbol Digit Modalities Test (SDMT). These findings highlight CCA
Area of Science:
- Neuroscience
- Radiology
- Cognitive Science
Background:
- Long-term changes in corpus callosum area (CCA) and information processing speed are understudied in multiple sclerosis (MS).
- Investigating the relationship between brain structure and cognitive function in MS is crucial for understanding disease progression.
Purpose of the Study:
- To examine the relationship between CCA and information processing speed in cognitive, sensory, and motor tasks in MS patients over nine years.
- To assess the influence of demographic, clinical, and radiological factors on this relationship.
Main Methods:
- 22 MS patients underwent MRI to measure CCA and relative brain volume (RBV) at baseline and after nine years.
- Cognitive (Symbol Digit Modalities Test, SDMT), sensory (reaction time), motor (finger-tapping speed, FT), and inter-hemispheric transfer (verbal dichotic listening, VDL) tasks were performed.
- Statistical analyses accounted for potential confounding variables.
Main Results:
- Smaller CCA at baseline and follow-up correlated with slower SDMT performance.
- Faster rate of CCA change was associated with poorer VDL performance (left ear) and increased right ear advantage.
- Sensory-motor tasks and T2 lesion load showed different associations with CCA and performance.
- Demographic, clinical, and radiological factors did not confound the CCA-SDMT relationship.
Conclusions:
- CCA is significantly associated with cognitive processing speed (SDMT) in MS, indicating a cognitive rather than perceptual-motor component.
- CCA changes, unlike RBV and T2 lesion load, are a key indicator of cognitive decline in MS.
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