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What Causes Seizures

Some causes of seizures can include:
 -  alcohol poisoning
 -  drug overdose/ reaction
 -  hypoglycemia
 -  poisons (including toxins thrown of by liver or renal failure
 -  head injury
 -  neurological defect (normally genetic)
 -  fever (common in children
 -  sepsis
 -  brain tumor
 -  stroke or other vascular problems
          (Feldman, Henry)
     All seizures are caused by abnormal electrical disturbances in the brain.  This activity is a result of localized areas of abnormal brain tissue.  These areas may have been present from birth or even earlier (congenital), or they may develop further head trauma, infections, stroke, and certain other conditions.  For many people, no obvious cause can be determined.  Partial seizures are more likely to be caused by a definable lesion in adults than in children.   Partial seizures may occur at any age, as a single episode or as a repeated chronic disorder (epilepsy).  
      Risk factors include any injury to the brain, such as trauma, stroke, brain tumors, infections (such as meningitis), or prior brain surgery.  (U.S. National Library of Medicine)

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