Assessing the Effects of Photobiomodulation on Clinical Recovery From Concussion in Adolescents

Inclusion Criteria: * current participants in a school- or club-sponsored sport (contact or non-contact) * access to wireless internet service at home * diagnosis of sports-related concussion (SRC) (according to consensus diagnostic criteria) by a licensed healthcare provider,3-7 days from the concussive injury at the time of enrolment * considered at-risk for protracted recovery based on Immediate Post-concussion Assessment and Cognitive Testing (ImPACT) performance and symptom reporting on the Post-Concussion Symptom Scale (PCSS) Exclusion Criteria: * acute neurologic deterioration to a Glasgow Coma Scale score less than 13 * neurosurgical intervention * abnormal CT scan * concomitant extracranial injury worse than mild * pre-injury conditions which confound effects of SRC (e.g., epilepsy, schizophrenia, bipolar illness, mental deficiency, hospitalization for TBI) * substance dependence * inability to speak fluent English * Individuals who are taking benzodiazepines, anti-convulsants, mood stabilizers, stimulants, opioids, sleep aids, or other neuropsychiatric medications