Definition of mild traumatic brain injury as cited in Journal of Head Trauma Rehabilitation, 8(3): 86-87 is:
A patient with mild traumatic brain injury is a person who has had a traumatically induced physiological disruption of brain function as manifested by at least one of the following:
- Any period of loss of consciousness
- Any loss of memory for events immediately before or after the accident;
- Any alteration in mental state at the time of the accident (e.g. feeling dazed, disoriented or confused);
- Focal neurological deficit(s), that may or may not be transient but where the severity of the injury does not exceed the following:
- Loss of consciousness of approximately 30 minutes or less;
- After 30 minutes, an initial Glasgow Coma Scale (GCS) of 13-15; and
- Post-traumatic amnesia (PTA) not greater than 24 hours.
