Source: ottawacitizen.com | Re-Post Duerson Fund 1/11/2017 –
The damage done by concussions is apparent in the brain long after symptoms have gone away and could have profound effects as a person ages, according to new research done by a team of Ottawa neuroscientists.
The research by Prof. François Tremblay of the University of Ottawa’s Brain and Mind Research Institute and his graduate student, Travis Davidson, measured how information is passed from the brain to the limbs and between the left and right hemispheres of the brain. They found that information moved slower in subjects who had suffered concussions than it did in a control group of people who had no history of brain injury. The study was published in the journal Clinical Neurophysiology.
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“When we probed the transmission of information from one side to another, the group that had a history of concussion showed a delay in transmission. It was slower going from one side to the other.”
The brain is made up equally of grey matter — the nerve cells that do the brain’s ‘thinking’ — and white matter, the neural linkage that carries information between areas of grey matter.
Tremblay and Davidson used a non-invasive method that electrically stimulated one part of the brain, then measured how much and how fast that stimulation travelled through the white matter to other areas.