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MRI shows brain disruption in patients with post-concussion syndrome
Date:11/20/2012

OAK BROOK, Ill. MRI shows changes in the brains of people with post-concussion syndrome (PCS), according to a new study published online in the journal Radiology. Researchers hope the results point the way to improved detection and treatment for the disorder.

PCS affects approximately 20 percent to 30 percent of people who suffer mild traumatic brain injury (MTBI)defined by the World Health Organization as a traumatic event causing brief loss of consciousness and/or transient memory dysfunction or disorientation. Symptoms of PCS include headache, poor concentration and memory difficulty.

Conventional neuroimaging cannot distinguish which MTBI patients will develop PCS.

"Conventional imaging with CT or MRI is pretty much normal in MTBI patients, even though some go on to develop symptoms, including severe cognitive problems," said Yulin Ge, M.D., associate professor, Department of Radiology at the NYU School of Medicine in New York City. "We want to try to better understand why and how these symptoms arise."

Dr. Ge's study used MRI to look at the brain during its resting state, or the state when it is not engaged in a specific task, such as when the mind wanders or while daydreaming. The resting state is thought to involve connections among a number of regions, with the default mode network (DMN) playing a particularly important role.

"Baseline DMN is very important for information processing and maintenance," Dr. Ge said.

Alterations in DMN have been found in several psychiatric disorders, including Alzheimer's disease, autism and schizophrenia, but little is known about DMN connectivity changes in MTBI.

For the new study, Dr. Ge and colleagues used resting-state functional MRI to compare 23 MTBI patients who had post-traumatic symptoms within two months of the injury and 18 age-matched healthy controls. Resting state MRI detects distinct changes in baseline oxygen level fluctuations associated
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Contact: Linda Brooks
lbrooks@rsna.org
630-590-7762
Radiological Society of North America
Source:Eurekalert

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