The Neuroscience of ASMR: A Critical Review of Neural Signatures

This systematic review posits that Autonomous Sensory Meridian Response (ASMR) elicits reproducible neural activation patterns, yet the evidence is drawn from a relatively small pool of 18 eligible studies. The objective was to synthesise data on brain activation and emotional modulation using fMRI and EEG. To understand the neuroscience of ASMR, one must look past self-reported euphoria and examine the hard data.

The researchers utilised PRISMA guidelines to filter existing literature across 11 countries. They subsequently performed an Activation Likelihood Estimation (ALE) meta-analysis. This technique is designed to find statistical convergence amidst noise. The measurements yielded specific results. Individual fMRI studies indicated activation in the nucleus accumbens and medial prefrontal cortex. These areas are associated with reward and emotional regulation. However, the meta-analysis was more conservative. It identified only one statistically significant cluster of convergence: the left parietal lobe, specifically Brodmann areas 2 and 40. This region handles sensory processing.

Examining the Neuroscience of ASMR

EEG data measured increased alpha and theta oscillations. Such patterns are technically consistent with a state of physiological relaxation. The authors propose that these neural markers support the potential of ASMR as a tool for stress reduction and sleep improvement. While the reported mood improvements are promising, the study notes methodological heterogeneity. Different studies used different triggers. Until stimuli are standardised, the therapeutic utility remains theoretical rather than proven. The biological basis is visible, but the clinical application requires far more rigour.