An anoxic brain injury usually starts with a loss of consciousness. The person may then enter a state known as "wakeful unresponsiveness." In this state, they do not respond to any external stimuli, but they are not comatose either. If the person regains consciousness again, they can experience a whole host of cognitive and physical symptoms. Cognitive symptoms may include short-term memory loss, visual disturbances, decision-making problems, confusion, concentration problems, and linguistic difficulties. The physical symptoms they may experience include weakness in the limbs, coordination problems, abnormal movements, and difficulties performing sequential tasks. Other symptoms may include hallucinations, mood disorders, irritability, and agitation.