From: deputydog23x@gmail.com   
      
   Dementia and Head Injury   
      
      
   Head injury occurs when an outside force hits the head hard enough to cause   
   the brain to move violently within the skull. This force can cause shaking,   
   twisting, bruising (contusion), or sudden change in the movement of the brain   
   (concussion).   
   In some cases, the skull can break. If the skull is not broken, the injury is   
   a closed head injury. If the skull is broken, the injury is an open head   
   injury.   
   In either case, the violent jarring of the brain damages brain tissue and   
   tears nerves, blood vessels, and membranes.   
   The severity of this damage depends on the location and force of the blow to   
   the head.   
   Damaged brain tissue does not work normally.   
   The brain has many different functions in the body, and any of them can be   
   disrupted by this damage.   
   Not all brain damage is permanent. Like all body organs, the brain can heal to   
   a certain extent.   
   Even this healing may not bring the brain's function back to what it was   
   before the injury.   
   Even a relatively mild head injury can cause prolonged or permanent declines   
   in cognition. (Cognition is the processes of thinking, remembering,   
   understanding, reasoning, and communicating.) Head injury can also cause   
   changes in emotions or behavior.   
   Together, these changes are known as dementia.   
   The nature of dementia in head-injured persons varies greatly by type and   
   location of head injury and the person's characteristics before the head   
   injury.   
   After head injury, a person may have symptoms such as changes in personality,   
   emotional problems, and difficulty making decisions or solving problems.   
   The exact symptoms depend on the parts of the brain that are injured.   
   Likewise, the severity of symptoms can be related to the severity of the brain   
   injury, but this is not always true.   
   If the injury is not too severe, these symptoms may get better over time.   
   Direct damage to brain tissue and surrounding areas accounts for only part of   
   the problems in head injury. The resulting bleeding (bruising), fluid   
   collection (hydrocephalus), and infection can also damage the brain. A common   
   complication is epilepsy (   
   seizures).   
   Dementia after head injury is a significant public health problem.   
   In the United States, roughly 2 per 1000 people each year have some kind of   
   head injury. Many do not seek medical care.   
   Between 400,000 and 500,000 people are hospitalized in the United States every   
   year for head injury.   
   Younger people are more likely to have a head injury than older people. Head   
   injury is the third most common cause of dementia, after infection and   
   alcoholism, in people younger than 50 years.   
   Older people with head injury are more likely to have complications such as   
   dementia. Children are likely to have more severe complications.   
   Men, especially younger men, are more likely than women to have a head injury.   
   Dementia in Head Injury Causes   
   The following are the most common causes of head injury in civilians:   
   Motor vehicle accidents (50%)   
   Falls (21%)   
   Assault or gunshot wound (12%)   
   Sports, such as boxing (dementia pugilistica), or other recreational activity   
   (10%)   
   Use of alcohol or other substances is a factor in about half of these injuries.   
   Certain groups are more likely than others to sustain head injury.   
   In children, bicycle accidents are a significant cause of head injury.   
   Most head injuries in infants reflect child abuse. A common name for this is   
   shaken baby syndrome.   
   Elderly persons are especially likely to injure themselves by falling.   
   Dementia in Head Injury Symptoms   
   Dementia-related symptoms in head injury are those that affect thinking and   
   concentration, memory, communication, personality, interactions with others,   
   mood, and behavior.   
   These are only some of the symptoms that might be experienced after a head   
   injury.   
   Individuals experience different combinations of these symptoms depending on   
   the part of the head injured, the force of the blow, the damage caused, and   
   the person's personality before the injury.   
   Some symptoms appear rapidly, while others develop more slowly.   
   In most cases, symptoms have at least started to appear in the first month   
   after the injury.   
   Symptoms of dementia in head-injured persons include the following:   
   Problems thinking clearly   
   Memory loss   
   Poor concentration   
   Slowed thought processes   
   Irritability, easily frustrated   
   Impulsive behavior   
   Mood swings   
   Inappropriate behavior in social situations   
   Grooming and dressing eccentric or neglected   
   Restlessness or agitation   
   Insomnia   
   Aggression, combativeness, or hostility   
   Headache   
   Fatigue   
   Vague, nonspecific physical symptoms   
   Apathy   
   Some people develop seizures after a head injury. These are not part of the   
   dementia, but they can complicate diagnosis and treatment of dementia.   
   Major mental disorders may develop after head injury. Two or more of these may   
   appear together in the same person.   
   Depression - Sadness, tearfulness, lethargy, withdrawal, loss of interest in   
   activities once enjoyed, insomnia or sleeping too much, weight gain or loss   
   Anxiety - Excessive worry or fear that disrupts everyday activities or   
   relationships; physical signs such as restlessness or extreme fatigue, muscle   
   tension, sleeping problems   
   Mania - State of extreme excitement, restlessness, hyperactivity, insomnia,   
   rapid speech, impulsiveness, poor judgment   
   Psychosis - Inability to think realistically; symptoms such as hallucinations,   
   delusions (false beliefs not shared by others), paranoia (suspicious and   
   feeling of being under outside control), and problems thinking clearly; if   
   severe, behavior seriously    
   disrupted; if milder, behavior bizarre, strange, or suspicious   
   Obsessive-compulsive symptoms - Development of obsessions (uncontrolled,   
   irrational thoughts and beliefs) and compulsions (odd behaviors that must be   
   carried out to control the thoughts and beliefs); preoccupation with details,   
   rules, or orderliness to    
   such a degree that the larger goal is lost; lack of flexibility or ability to   
   change   
   Suicide risk - States feelings of worthlessness or that life is not worth   
   living or that world would be better off without him or her, talks about   
   suicide, states intention to commit suicide, develops plan to commit suicide   
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   http://www.dementiatoday.com/dementia-and-head-injury/   
      
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