Aggression is a behavior characterized by strong self-assertion
with hostile or harmful tones. Under some circumstances, aggression may be a
normal reaction to a threat. Alternatively, it may be abnormal, unprovoked or
reactive behavior (intermittent explosive disorder). Anger, confusion,
discomfort, fear, overstimulation and tiredness can lead to aggressive
reactions.
Aggressive behaviors may be directed at oneself, at others, at
animals, or at property. They can be verbal or physical. They can be premeditated
and goal-oriented or impulsive. They can be direct or indirect, overt or
covert.
Aggression is a potential symptom of diseases, disorders or
conditions that interfere with thought processes, such as brain tumors,
dementia, post-traumatic stress disorder, schizophrenia, and a number of
personality disorders. Although specific causes of aggression are not known,
some studies have shown that abnormal brain chemistry or structural changes may
play a role. Environment and genetics also seem to be involved.
Intermittentexplosive disorder (sometimes abbreviated as IED) is a behavioral
disorder characterized by explosive outbursts of anger, often to the point of
rage, that are disproportionate to the situation at hand (i.e., impulsive
screaming triggered by relatively inconsequential events). Impulsive aggression
is unpremeditated, and is defined by a disproportionate reaction to any provocation,
real or perceived. Some individuals have reported affective changes prior to an
outburst (e.g., tension, mood changes, energy changes, etc.)
