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In many cases of brain injury, the extent of the injury is difficult to determine by simply observing, especially in mild traumatic brain injuries. Brain injuries may be manifest in physical, cognitive and/or emotional changes in the victim. Physical signs of a brain injury may include diminished capacity in speech, hearing, vision or endurance. Fatigue, frequent headaches, spasms or paralysis may also be signs of a brain injury. Cognitive signs of a brain injury may include reductions in concentration, attention, perception, planning, writing and reading skills, short and long term memory, and orientation. Behavioral signs of a brain injury may include excessive mood swings, depression, sexual dysfunction or agitation. Many people with brain injuries say that their “personality” changes. If you are experiencing any of these conditions, or are observing them in a loved one, you should visit a healthcare professional immediately.