Autonomous sensory meridian response (ASMR) is a neologism for a perceptual phenomenon characterized as a distinct, pleasurable tingling sensation in the head, scalp, back, or peripheral regions of the body in response to visual, auditory, tactile, olfactory, and/or cognitive stimuli. The nature and classification of the ASMR phenomenon is controversial,[1] with a considerable cult following and strong anecdotal evidence to support the phenomenon but little or no scientific explanation or verified data