The amygdala can learn to associate new stimuli with fear and become less reactive to previously feared stimuli.

“you learn to be afraid of something or somebody that didn't used to scare you and your amygdala does the exact same sort of cellular basis of learning that goes on in other parts of your brain when you learn somebody's middle name and actually remember it your amygdala learns to be afraid of new things and when you manage to stop being afraid of something when you stop being afraid of thems because it turns out oh they're actually more similar to use than you thought or something it's your amygdala that becomes less reactive to stimuli like that's how your amygdala is absolutely central to some of our worst human moments”