This study is part of a larger, multi-centered project done with the collaboration of University Of Victoria. This study holds three separate studies on the mild traumatic brain injured population and the use of perceptual-cognitive training (3D-MOT).

Inclusion Criteria:

• The child experienced a head injury (a direct or indirect blow to the head) resulting in concussion-like symptoms (e.g. headache, nausea, balance problems, tiredness, visual problems, cognitive issues) in the previous 72 hours
• Parent/legal guardian speak English or French
• The child speak English or French

Exclusion Criteria:

• Previous concussion in the last 6 months, or any previous concussion with unresolved symptoms
• Multi-system injuries requiring admission, operating room, procedural sedation in the Emergency Department
• Other co-existing injuries, co-morbidities or diagnoses preventing participation to intervention/assessment of gait and balance
• Pre-morbid or co-morbid condition affecting visual function
• Patient intoxicated at the time of injury
• Significant developmental delay
• Loss of consciousness prior to head injury