Article

Recent neuroimaging studies suggest that abnormalities in
brain function after concussion exist beyond the point of observed clinical
recovery. This study investigated the relationship between an index of brain
dysfunction (traumatic brain injury [TBI] Index), concussion severity, and
outcome. METHODS: EEG was collected from forehead locations in 65 male athletes
with concussion within 24 hours of concussion, with follow-up at 8 and 45 days
postinjury. Neurocognitive and symptom assessments were also performed and used
to classify subjects in mild or moderate concussion categories. Time to return to
play was recorded. RESULTS: The TBI Index was higher in the moderate than mild
concussion group at injury, day 8, and day 45. The moderate group had increased
symptoms and decreased cognitive performance only at the time of injury. At the
time of injury, only the TBI Index was significantly associated with the length
of time to return to play. CONCLUSIONS: Recovery of brain function after
sport-related concussion may extend well beyond the time course of clinical
recovery and be related to clinical severity. An index of brain dysfunction may
be an objective indicator of injury, recovery, and readiness to return to play.
The relatively small sample indicates the need for further study on the time
course of physiological recovery.

Langue : ANGLAIS