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UTHealth researchers link multiple sclerosis to different area of brain
Date:12/22/2011

HOUSTON (Dec. 22, 2011) Radiology researchers at The University of Texas Health Science Center at Houston (UTHealth) have found evidence that multiple sclerosis affects an area of the brain that controls cognitive, sensory and motor functioning apart from the disabling damage caused by the disease's visible lesions.

The thalamus of the brain was selected as the benchmark for the study conducted by faculty at the UTHealth Medical School. Lead researchers include Khader M. Hasan, Ph.D., associate professor, and Ponnada A. Narayana, Ph.D., professor and director of Magnetic Resonance Imaging (MRI) in the Department of Diagnostic and Interventional Imaging; and Jerry S. Wolinsky, M.D., the Bartels Family and Opal C. Rankin Professor in the Department of Neurology.

Results of the research were published in a recent edition of The Journal of Neuroscience.

"The thalamus is a central area that relates to the rest of the brain and acts as the 'post office,' " said Hasan, first author of the paper. "It also is an area that has the least amount of damage from lesions in the brain but we see volume loss, so it appears other brain damage related to the disease is also occurring."

Researchers have known that the thalamus loses volume in size with typical aging, which accelerates after age 70. The UTHealth multidisciplinary team's purpose was to assess if there was more volume loss in patients with multiple sclerosis, which could explain the dementia-related decline associated with the disease.

"Multiple sclerosis patients have cognitive deficits and the thalamus plays an important role in cognitive function. The lesions we can see but there is subclinical activity in multiple sclerosis where you can't see the changes," said senior author Narayana. "There are neurodegenerative changes even when the brain looks normal and we saw this damage early in the disease process."

For the study, researchers used precise
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Contact: Deborah Mann Lake
deborah.m.lake@uth.tmc.edu
University of Texas Health Science Center at Houston
Source:Eurekalert

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