what are the signs and symptoms of brain injury?
['Loss of consciousness for a few seconds to a few minutes.', 'No loss of consciousness, but a state of being dazed, confused or disoriented.', 'Headache.', 'Nausea or vomiting.', 'Fatigue or drowsiness.', 'Problems with speech.', 'Difficulty sleeping.', 'Sleeping more than usual.']