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Cooling may prevent trauma-induced epilepsy
Date:2/21/2013

In the weeks, months and years after a severe head injury, patients often experience epileptic seizures that are difficult to control. A new study in rats suggests that gently cooling the brain after injury may prevent these seizures.

"Traumatic head injury is the leading cause of acquired epilepsy in young adults, and in many cases the seizures can't be controlled with medication," says senior author Matthew Smyth, MD, associate professor of neurological surgery and of pediatrics at Washington University School of Medicine in St. Louis. "If we can confirm cooling's effectiveness in human trials, this approach may give us a safe and relatively simple way to prevent epilepsy in these patients."

The researchers reported their findings in Annals of Neurology.

Cooling the brain to protect it from injury is not a new concept. Cooling slows down the metabolic activity of nerve cells, and scientists think this may make it easier for brain cells to survive the stresses of an injury.

Doctors currently cool infants whose brains may have had inadequate access to blood or oxygen during birth. They also cool some heart attack patients to reduce peripheral brain damage when the heart stops beating.

Smyth has been exploring the possibility of using cooling to prevent seizures or reduce their severity.

"Warmer brain cells seem to be more electrically active, and that may increase the likelihood of abnormal electrical discharges that can coalesce to form a seizure," Smyth says. "Cooling should have the opposite effect."

Smyth and colleagues at the University of Washington and the University of Minnesota test potential therapies in a rat model of brain injury. These rats develop chronic seizures weeks after the injury.

Researchers devised a headset that cools the rat brain. They were originally testing its ability to stop seizures when they noticed that cooling seemed to be not only stopping but also
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Contact: Michael C. Purdy
purdym@wustl.edu
314-286-0122
Washington University School of Medicine
Source:Eurekalert  

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