An experimental EEG study of brain activities underlying the Autonomous Sensory Meridian Response

Area of Science:

• Neuroscience
• Psychology
• Human-Computer Interaction

Background:

• Autonomous Sensory Meridian Response (ASMR) is a popular audio-visual phenomenon characterized by a tingling sensation and relaxation.
• Despite widespread anecdotal reports of well-being improvements, the underlying neural mechanisms of ASMR remain largely uninvestigated.
• Understanding ASMR's neural correlates is crucial for validating subjective experiences and exploring therapeutic applications.

Purpose of the Study:

• To investigate the neural activity associated with Autonomous Sensory Meridian Response (ASMR) using electroencephalography (EEG).
• To compare brain activity patterns between individuals who can experience ASMR (ASMR group) and those who cannot (Non-ASMR group).
• To identify specific EEG frequency band changes associated with ASMR experiences.

Main Methods:

• Recorded resting-state electroencephalography (EEG) from twelve participants before and after viewing ASMR and control video clips.
• Classified participants into ASMR and Non-ASMR groups based on self-report questionnaire data using Jenks Natural Breaks clustering.
• Analyzed spectral power of EEG recordings, comparing frequency band activities (delta, alpha, beta) between groups and conditions.

Main Results:

• The ASMR group exhibited decreased delta band activity across all brain regions.
• Increased alpha activity was observed in the occipital area, and increased beta oscillations in the left fronto-temporal region among the ASMR group.
• These specific EEG changes were not observed in the Non-ASMR group or in the ASMR group during control video viewing.

Conclusions:

• Distinct EEG changes in delta, alpha, and beta frequencies are associated with the experience of Autonomous Sensory Meridian Response.
• These findings suggest specific neural underpinnings for the ASMR phenomenon, differentiating responders from non-responders.
• Further research can explore the therapeutic potential of ASMR by understanding its neurophysiological basis.