ASMR is a sensation of chills or tingling that starts from your scalp or back of your neck and envelops your body in the tingly sensation. The trigger is most commonly a sound, but some say they’ve achieved the same tingling feeling through certain sights as well.
Think about nails scratching a chalkboard for one second. Are you flinching? One study found that this sound literally accelerated the participants’ stress levels, quickening heart rates, heightening blood pressure and even altering the skin’s electrical conductivity. In the study, the scientists discovered that—when stimulated with this screeching sound, the auditory cortex interacted with the amygdala, which controls responses related to fear and emotions.