The Amygdala and the Neuroscience of Panic

The amygdala, it's a part of your brain that is a fear response. The sympathetic nervous system is the fight or flight system which kept our ancestors alive. It floods your body with adrenaline and norepinephrine - stress hormones. But if there's no bear to run away from, or there's no intruder to fight, this fight-or-flight system doesn't stop.