What is Cortisol?

Cortisol is your stress hormone.  It increases in your body to organize fight, flight, faint behavior.  This includes shutting down any systems not immediately needed for escape or combat, shutting down your immune system, and switching your brain to acting based on habits.

On a molecular level, a cortisol cascade shut down the connection that allows your prefrontal cortex to modulate your amygdala.  This sets the amygdala free to fire, signaling intense arousal.  At Mindful360, we discuss this effect in our Amygdala hijack series.

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