Participants sought: Biomarkers in brain trauma

Healthy participants sought for concussion biomarker study.
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Biomarkers in Brain Trauma (BIOBiT-III) - Diagnosis and follow-up of concussion after mild traumatic brain injury

Concussion is common, in particular, during combat training and contact sports, leading to disturbance in brain function caused by direct or indirect force to the head. Concussion typically results in the rapid onset of short-lived impairment of neurological function that resolves spontaneously in most cases. 

There are, however, no current tests that can reliably detect subtle changes from concussion or track brain recovery. 

Brain injury from concussion in young football players causes long-term damage

Study shows subtle abnormalities in young AFL football players' brains
six months after concussion injury.

Monash Neuroscience Trauma Group researchers have published the first study to report long-term physical damage to the brains of young adult Australian rules players, even six months after their most recent concussion, raising concerns about the long term neurological health of these players. 

See:

• Monash Medicine news story
• Cerebral Cortex paper 
• Monash Trauma Group