This Week’s Q&A
Monday, September 1st, 2008
Q: Is there any recent research that supports the idea of brain plasticity?
A: There have been a handful of studies over the last decade that can be considered to support the idea of brain plasticity, the brain’s ability reorganize in response to input, a very useful growth mechanism that can benefit traumatic brain injury (TBI) recovery. Here is one of the most recent areas of research:
A study from the Berenson-Allen Center for Noninvasive Brain Stimulation at Beth Israel Deaconess Medical Center (BIDMC) has shown through tests on the effects of blindness that the brain possesses more reorganization ability than originally assumed.
How does vision and brain plasticity mesh? The studies’ senior author Alvaro Pascual-Leone, the director of the Berenson-Allen Center, used blindfolded subjects to demonstrate how the area of the brain that controls vision quickly switches to touch when the use of the eyes are no longer available.
Pascual-Leone believes that this indicates an ability that was dormant while sight was intact. It’s not that our brain is creating new connections, according to the author, but that they already exist. In this study, the blindfolded participants were better at learning Braille than those without.
According to the Newswise article, “as predicted, the researchers found that the subjects who were blindfolded were superior at learning Braille than their non-blindfolded counterparts. Furthermore, the brain scans of the blindfolded subjects showed that the brain’s visual cortex had become extremely active in response to touch (in contrast to the initial scan in which there was little or no activity).”
We can all most likely recall times that we closed our eyes to better hear or taste something, and because of these automatic impulses, we have already experienced the brain’s ability to compensate with the other senses. Studies like this one bring our brain’s amazing potential into relief.
Those with brain injuries experience everything from a slightly impaired ability to recall things to a loss of all conscious awareness. It will be interesting to see how these discoveries can be applied to TBI patients and whether or not there is the potential to stimulate non responsive areas of the brain with these methods.








