Closed-head injury is a type of traumatic brain injury in which the skull and dura mater remain intact. Closed-head injuries are the leading cause of death in children under 4 years old and the most common cause of physical disability and cognitive impairment in young people. Overall, closed-head injuries and other forms of mild traumatic brain injury account for about 75% of the estimated 1.7 million brain injuries that occur annually in the United States. Brain injuries such as closed-head injuries may result in lifelong physical, cognitive, or psychological impairment and, thus, are of utmost concern with regards to public health. If symptoms of a head injury are seen after an accident, medical care is necessary to diagnose and treat the injury. Without medical attention, injuries can progress and cause further brain damage, disability, or death. Because the brain swelling that produces these symptoms is often a slow process, these symptoms may not surface for days to weeks after the injury. Common symptoms of a closed-head injury include: headache dizziness nausea vomiting slurred speech Severe head injuries can lead to permanent vegetative states or death, therefore being able to recognize symptoms and get medical attention is very important. Symptoms of a severe closed-head injury include: coma or vegetative states seizures or convulsions loss of consciousness Secondary symptoms are symptoms that surface during rehabilitation from the injury including social competence issues, depression, personality changes, cognitive disabilities, anxiety, and changes in sensory perception. More than 50% of patients who suffer from a traumatic brain injury will develop psychiatric disturbances. Although precise rates of anxiety after brain injury are unknown, a 30-year follow-up study of 60 patients found 8.3% of patients developed a panic disorder, 1.7% developed an anxiety disorder, and 8.3% developed a specific phobia. Patients recovering from a closed-head or traumatic brain injury often suffer from decreased self-esteem and depression.

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