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Mild traumatic brain injury, not so mild after all

Date:
February 22, 2010
Source:
University of Pennsylvania School of Medicine
Summary:
Scientists are gaining a better understanding of the molecular mechanism at play in mild traumatic brain injury (mTBI), commonly called concussions. Although mTBI affects over one million people each year in the United States, it is generally ignored as a major health issue.

Douglas Smith, MD, director of the Center for Brain Injury and Repair and professor of Neurosurgery at the University of Pennsylvania School of Medicine, presented findings on the molecular mechanism at play in mild traumatic brain injury (mTBI), commonly known as concussions, recently at the 2010 American Association for the Advancement of Science meeting in San Diego.

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Although mTBI affects over 1 million people each year in the United States, it is generally ignored as a major health issue. However, this "mild" form of injury induces persisting neurological and cognitive problems in many of these patients, exacting an enormous emotional and financial toll on society.

Despite the prevalence and impact of mTBI, little is known about how mTBI affects nerve cells and connections in the brain, and therefore clinical outcomes after injury. Smith and colleagues have begun to amass data from human and animal studies on mTBI at 2-4 days after injury using advanced neuroimaging techniques. They have found distinct changes throughout the white matter in the brain. Also, protein markers of brain pathology were identified after mTBI in the blood of mTBI patients.

Smith and his team propose a potential molecular mechanism to explain their findings. Specifically, they found that the stretching and disconnecting of nerve-cell axons after mTBI induces problems in the sodium channels found on the surface of neurons.

"This is not inconsequential," says Smith. "Indeed, the observation that brain pathology can be detected after a concussion calls for much more extensive efforts to prevent, diagnose, and treat mild traumatic brain injury."


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The above story is based on materials provided by University of Pennsylvania School of Medicine. Note: Materials may be edited for content and length.


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University of Pennsylvania School of Medicine. "Mild traumatic brain injury, not so mild after all." ScienceDaily. ScienceDaily, 22 February 2010. <www.sciencedaily.com/releases/2010/02/100219204409.htm>.
University of Pennsylvania School of Medicine. (2010, February 22). Mild traumatic brain injury, not so mild after all. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2010/02/100219204409.htm
University of Pennsylvania School of Medicine. "Mild traumatic brain injury, not so mild after all." ScienceDaily. www.sciencedaily.com/releases/2010/02/100219204409.htm (accessed November 27, 2014).

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