ASMR stands for Autonomous Sensory Meridian Response. It is a tingling sensation that usually begins on the scalp and moves down the back of the neck and upper spine. ASMR is a subjective experience of "low-grade euphoria" characterized by "a combination of positive feelings and a distinct static-like tingling sensation on the skin". It is most commonly triggered by specific auditory or visual stimuli, and less commonly by intentional attention control. ASMR triggers, which are most commonly auditory and visual, may be encountered through the interpersonal interactions of daily life, or through exposure to specific audio and video. Some common triggers include listening to a softly spoken or whispering voice, listening to a person blow or exhale into a microphone, listening to mouth sounds, such as quiet clicking of the tongue or tisking, listening to tapping, typically with ones nails onto hard surfaces, and listening to buttons being pressed, mostly those of computer keyboards or video game controllers. Although there is growing interest in ASMR, there is still relatively little scientific research conducted to date on the phenomenon.