Misophonia Triggers: Auditory vs. Visual Responses

A new study from the University of South Carolina provides the clearest picture yet of what happens in the body during a misophonic reaction. The research, led by Xuan Yang, Sewon Oh, Douglas H. Wedell, and Svetlana V. Shinkareva, recorded multiple physiological signals to show that reactions to trigger sounds are distinct from general annoyance. The data also confirm that seeing a trigger—and even thinking about one—can activate the body’s stress systems.

A Multi-Channel Look at the Body’s Alarm System

The researchers measured reactions across five physiological channels in people with misophonia and a control group. They tracked electromyographic (EMG) activity over the corrugator supercilii (frowning muscle) and zygomaticus major (cheek-raising muscle) to measure subtle facial expressions linked to negative and positive affect. Electro-dermal activity (EDA) monitored sweat gland activity for arousal, while heart rate (HR) and fingertip skin temperature tracked autonomic nervous system engagement.

Participants were exposed to three types of stimuli: their personal misophonic trigger sounds (like chewing), generally aversive sounds (like screaming), and neutral sounds. Critically, these were presented in three ways: as sounds, as silent videos of the trigger action (like watching someone chew), and as a cue to mentally imagine the trigger sound.

Trigger Sounds Elicit a Distinct Physiological Signature

The results, published in Psychophysiology, show a clear pattern. When hearing trigger sounds, the misophonia group had significantly greater physiological reactions than controls. Their responses were also stronger than their own reactions to generally aversive sounds. This was evident across four channels: increased frowning muscle activity (EMGc), cheek muscle activity (EMGz), electrodermal activity (EDA), and heart rate (HR).

“This indicates heightened affective and autonomic engagement beyond general aversiveness,” the authors write. The body’s reaction to a trigger like chewing is quantitatively and qualitatively different from its reaction to a universally unpleasant sound like a scream.

Seeing the Trigger is Enough to Provoke a Reaction

The study offers strong empirical evidence for a common patient report: visual cues are often enough. Silent videos of trigger actions—a person chewing with no sound—also evoked greater physiological responses in the misophonia group. The effect was observed in fewer channels than the auditory triggers, primarily in the frowning muscle (EMGc) and heart rate (HR), but it was statistically significant.

This finding helps explain why individuals with misophonia might feel distressed simply by seeing someone prepare to eat or perform another trigger action. The brain has learned to associate the visual cue with the impending aversive sound, activating a preparatory stress response. This connects to broader models of predictive brain networks in hearing disorders, where the brain’s expectations can drive negative reactions.

Even Mental Imagery Can Activate the Response

Perhaps the most novel finding is that auditory mental imagery—being cued to imagine a trigger sound—produced a measurable group-level difference. The effect was weaker and limited primarily to increased electrodermal activity (EDA) in the misophonia group. This suggests that internally generating the trigger sound can engage the arousal component of the misophonic response, even in the absence of any sensory input.

Across all three modalities, the study found a tight link between subjective experience and physiology. Greater self-reported distress in the moment was consistently associated with greater EMGc, EMGz, EDA, and HR responses. “This indicates a close correspondence between physiological activation and the subjective experience of misophonic distress,” the authors note. Interestingly, these momentary reactions were not strongly tied to a person’s overall misophonia severity score, suggesting that trait severity and state reactivity are different aspects of the condition.

Practical Implications and Future Directions

This comprehensive physiological characterization has several practical implications. First, it solidifies misophonia as a condition with a clear biological component, moving it beyond subjective reports. The multi-channel approach could help in developing more objective biomarkers for diagnosis or treatment monitoring.

Second, the visual and imagery findings are critical for therapy. Effective treatments must address not just the sound itself, but the learned associations with visual contexts and the power of anticipatory anxiety and internal triggers. Cognitive and behavioral strategies that target these associations could be beneficial. For instance, understanding the visual component is as important as managing the auditory one, similar to approaches discussed in our guide to hyperacusis causes and management.

Finally, the study frames misophonia as “a disorder of maladaptive salience attribution.” The brain mistakenly labels specific, often mundane, stimuli as threats worthy of a full defensive mobilization. This framing opens doors to therapeutic approaches that aim to retrain this salience network, which could include elements of mindfulness or novel interventions that target neural plasticity. Some emerging research into psychedelic plasticity in hearing disorder therapy explores similar mechanisms of altering entrenched brain networks, though direct application to misophonia remains speculative.

The work by Yang and colleagues provides a robust physiological foundation for understanding misophonia. It confirms that the distress is real, measurable, and can be triggered through multiple pathways—by sound, by sight, and even by thought.

Source: Yang X, Oh S, Wedell DH, Shinkareva SV. Physiological Responses to Auditory, Visual, and Auditory Imagery Triggers in Misophonia. Psychophysiology. 2026;63(9):e70390. doi:10.1111/psyp.70390. PMID: 42684089.