Impact on Behavior When a human is under stress the adrenal glands secrete epinephrine , which is also known as adrenaline (S-cool, 2011) and other stress hormones, like cortisol which is used for long term flight or fight. Adrenaline activates the sympathetic nervous system (SNS) (Plesman & Nutr, Anxiety and the Autonomic Nervous System, 2011). The SNS can then cause anhedonia, which is an inability to feel any pleasure, increased pupil dilation, increased focus, shaking, trembling, dizziness, nausea…
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