Aggressive behavior in patients with psychiatric disorders has many possible causes1 . Probably the most important causes are the presence of comorbid substance abuse, dependence, and intoxication. In addition, the disease process itself may produce hallucinations and delusions, which may provoke violence. Often, poor impulse control related to neuropsychiatric deficits may facilitate the discharge of aggressive tendencies. Finally, underlying personality characteristics, such as antisocial personality traits, also may influence the use of violent acts as a means to achieve certain goals. Environmental factors that are associated with aggressive behavior include a chaotic or unstable home or hospital situation, which may encourage maladaptive aggressive behaviors.
http://emedicine.medscape.com/article/288689-overview




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