The study used a type of MRI brain scan called diffusion tensor imaging along with regular MRI scans to compare brain measurements in 20 people with MS who had related cognitive problems, 35 people with MS who did not have cognitive problems and 30 healthy participants.
The diffusion tensor images showed that, compared to the healthy control participants, 49 percent of the investigated brain white matter had impaired integrity in those with MS and no cognitive problems, while impaired integrity was evident in 76 percent of the investigated white matter of those with MS and related cognitive problems. In the people with MS-related cognitive problems, the extra white matter dysfunction was particularly seen in areas important for cognitive skills, such as the thalamus.
“This state-of-the-art imaging technology confirms that cognitive symptoms in MS have a biological basis,” said study author Hanneke E. Hulst, MSc, of VU University Medical Center in Amsterdam, the Netherlands. “The consequence of this discovery is that imaging can now be used to capture a wider spectrum of changes in the brains of people with MS, and will therefore help determine more accurately whether new treatments are helping with all aspects of the disease.”
Cognitive problems are common in MS, affecting up to 65 percent of people with the disease.
The study was supported by the Dutch MS Research Foundation.
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The American Academy of Neurology, an association of more than 25,000 neurologists and neuroscience professionals, is dedicated to promoting the highest quality patient-centered neurologic care. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as Alzheimer’s disease, stroke, migraine, multiple sclerosis, brain injury, Parkinson’s disease and epilepsy. For more information about the American Academy of Neurology, visit http://www.aan.com