MNI researchers locate neurological basis of depression following sports concussion

Jan 18, 2008

Researchers at the Montreal Neurological Institute of McGill University have identified the neurological basis of depression in male athletes with persisting post-concussion symptoms. The study, published in this week’s issue of Archives of General Psychiatry, has important clinical implications for the treatment of individuals who have suffered a cerebral concussion.

Depression is one of a number of persisting symptoms experienced by athletes following sports concussion. The prevalence of depression in the general population is around 5%, whilst the prevalence of depression in head trauma patients can reach an astounding 40 %.

“Until now, very little was known about the neurological basis of the depression frequently reported by athletes following concussion,’ says Dr. Alain Ptito, neuropsychologist and researcher at the MNI, and lead investigator for the study. Traditional testing methods for concussion yielded normal results with no obvious cognitive or neurological deficits. Persistent complaints have been perceived as subjective and ill-defined without neurological basis. Injury to the brain following concussion takes place at a microscopic level and is therefore difficult to measure in a patient.

Using enhanced brain imaging technology, researchers are now able to gain new insights into the damage caused by concussion. “Using functional MRI (fMRI), a computerized imaging technique that measures blood oxygen levels, we were able to detect areas of the brain with abnormal neural activity,” explained Dr. Ptito. Dr. Ptito and colleagues tested fifty-six male athletes, 40 with concussion and 16 healthy controls. Using a depression index, 16 of the concussed subjects had no symptoms of depression, 16 expressed mild depression and 8 had moderate symptoms of depressions. Concussed athletes with depression showed reduced brain activity in regions known to be implicated in depression, specifically, the dorsolateral prefrontal cortex and striatum and attenuated deactivation in medial frontal and temporal regions. We discovered that concussed subjects with depression presented with the same pattern of brain activation as that seen for patients with major depression.”

Other studies have shown a link between a history of brain injury and probability of developing major depression later in life. Therefore understanding the pathology of depression in concussed subjects has important implications for early intervention and successful outcomes.

Source: Montreal Neurological Institute and Hospital

Explore further: An Ebola virus protein can cause massive inflammation and leaky blood vessels

add to favorites email to friend print save as pdf

Related Stories

Britain urges Russia to shut down webcam spying site

2 hours ago

A Russian website offering thousands of live feeds peering into bedrooms and offices around the world by accessing poorly secured webcams should be taken down immediately, British officials said on Thursday.

Geologists discover ancient buried canyon in South Tibet

2 hours ago

A team of researchers from Caltech and the China Earthquake Administration has discovered an ancient, deep canyon buried along the Yarlung Tsangpo River in south Tibet, north of the eastern end of the Himalayas. ...

Recommended for you

Organovo has 3D-printed liver tissue for drug testing

54 minutes ago

(Medical Xpress)—The commercial release of 3D printed liver tissue was announced earlier this week. Organovo is the company behind the release. The product is intended for use for preclinical drug discovery ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.