another amygdala-driven ripple through the adrenocortical branch of the nervous system creates a general tonic background of action readiness, which lasts much longer than the catecholamine energy surge. This generalized adrenal and cortical excitation can last for hours and even days, keeping the emotional brain in special readiness for arousal, and becoming a foundation on which subsequent reactions can build with particular quickness. In general, the hair-trigger condition created by adrenocortical arousal explains why people are so much more prone to anger if they have already been
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