frisson

thumb|right|Piloerection (goose bumps), the physical part of frisson Frisson ( , ; French for "shiver"), also known as aesthetic chills or psychogenic shivers, is a psychophysiological response to rewarding stimuli (including music, films, stories, people, photos, and rituals) that often induces a pleasurable or otherwise positively-valenced affective state and transient paresthesia (skin tingling or chills), sometimes along with piloerection (goose bumps) and mydriasis (pupil dilation). The sensation can occur as a mildly to moderately pleasurable emotional response to music with skin tingling.

The psychological component (i.e., the pleasurable feeling) and physiological components (i.e., paresthesia, piloerection, and pupil dilation) of the response are mediated by the reward system and sympathetic nervous system, respectively. The stimuli that produce this response are specific to each individual. Frisson is of short duration, lasting only a few seconds. Typical stimuli include loud passages of music and passages—such as appoggiaturas and sudden modulation—that violate some level of musical expectation. While frisson is usually known for being evoked by experiences with music, the phenomenon can additionally be triggered with poetry, videos, beauty in nature or art, eloquent speeches, the practice of science (mainly physics and mathematics), and can also be triggered on command by some people without any external stimuli. During a frisson, a sensation of chills or tingling is felt on the skin of the lower back, shoulders, neck, and/or arms. The sensation of chills is sometimes experienced as a series of 'waves' moving up the back in rapid succession and commonly described as "shivers up the spine." Hair follicles may also undergo piloerection.