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Using Facial Electromyography to Assess Facial Muscle Reactions to Experienced and Observed Affective Touch in Humans

Using Facial Electromyography to Assess Facial Muscle Reactions to Experienced and Observed Affective Touch in Humans

Published on: March 15, 2019

Influence of vision on masticatory muscles function: surface electromyographic evaluation.

Domenico Ciavarella¹, Antonio Palazzo¹, Alfredo De Lillo¹

¹Department of Clinical and Experimental Medicine, Faculty of Medicine, School of Dentistry, University of Foggia, Italy.

Annali Di Stomatologia

|July 9, 2014

Summary

Ocular disorders may influence masticatory muscles pain (MMp). Surface electromyography (sEMG) revealed significant differences in muscle activity between patients with MMp and healthy individuals when eyes were closed versus open.

Keywords:

masticatory muscles pain ocular disorders surface electromyography

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Area of Science:

Neurology
Ophthalmology
Biomedical Engineering

Background:

The link between ocular disorders (OD) and masticatory muscles pain (MMp) is debated.
Ocular arc reflexes (OAR) might affect head and neck posture, influencing muscle contraction and leading to weakness.

Purpose of the Study:

To investigate the relationship between ocular status and masticatory muscle activity in patients with MMp.
To assess if OD contribute to the pathogenesis of MMp.

Main Methods:

Surface electromyography (sEMG) was used to record muscle activity in 28 participants (13 with MMp and myopia, 15 healthy controls).
sEMG recordings were taken in a resting position with eyes open and eyes closed.
Statistical analysis compared muscle activation between groups and conditions.

Main Results:

Healthy individuals showed no significant sEMG differences between eyes open and closed.
Patients with MMp exhibited significant differences in sEMG activity with eyes open versus closed.
Temporalis and masseter muscles showed statistically significant differences in activation (p=0.0010 and p=0.0006, respectively) in MMp patients between the two eye conditions.

Conclusions:

Ocular disorders may play a significant role in the pathogenesis of masticatory muscles pain.
Differences in muscle activation patterns based on eye condition suggest a link between visual input and masticatory muscle function in MMp.