An emotional response consist of three types of components: (1) behavioral, (2) autonomic, and (3) hormonal. Behavioral component consist of muscular movements that are appropriate to the situation that elicits them. Autonomic responses facilitate the behaviors and provide quick mobilization of energy for vigorous movements (these are like increased heart rate and the like) The integration of the components of fear appears to be controlled by the amygdala. Amygdala divided into 12 regions containing several subregions. We"ll study 3 major regions: (1) the lateral nucleus, (2) the basal nucleus, and (3) the central nucleus. Medial nucleus agitated and show stress induced illnesses (e. g. ulcers): consist of several subnuclei which receive sensory input, information related to the basal forebrain and hypothalamus, involved in reproductive functions. It is especially important to learn that a particular stimulus or situation is dangerous or threatening.