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Updated: Jun 23, 2026

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models

Published on: March 1, 2015

Oral vs. pharyngeal dysphagia: surface electromyography randomized study.

Michael Vaiman¹, Oded Nahlieli²

¹Department of Otolaryngology, Assaf Harofeh Medical Center, affiliated to the Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.

BMC Ear, Nose, and Throat Disorders

|May 23, 2009

Summary

Surface electromyography (sEMG) helps differentiate oral from pharyngeal dysphagia. Oral issues show prolonged swallowing and reduced masseter muscle activity, unlike pharyngeal conditions.

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Published on: December 1, 2023

Area of Science:

Otorhinolaryngology
Neurology
Biomedical Engineering

Background:

Differential diagnosis between oral and pharyngeal dysphagia is challenging.
Oral cavity disorders are often missed in dysphagia assessments.
Surface electromyography (sEMG) can aid in evaluating dysphagia.

Purpose of the Study:

To differentiate oral from pharyngeal dysphagia using sEMG.
To evaluate dysphagia complaints in patients with oral and pharyngeal pathologies.

Main Methods:

sEMG studies were conducted on patients with dental surgery, oral infections, acute tonsillitis, and healthy controls.
Evaluated parameters included timing and amplitude of sEMG activity of masseter, infrahyoid, and submental muscles during swallowing.

Main Results:

Dental patients exhibited significantly increased swallow and drinking durations.
Masseter muscle activity was significantly lower in dental and oral infection groups compared to tonsillitis and control groups.
Infrahyoid muscle activity was high in tonsillitis patients but normal in dental patients.

Conclusions:

Oral dysphagia (dental surgery/infections) presents distinct sEMG patterns: prolonged swallow duration, increased drinking time, low masseter activity, and normal submental activity.
Pharyngeal dysphagia (tonsillitis) shows hyperactivity of infrahyoid muscles.
sEMG findings can assist in differential diagnosis between oral and pharyngeal causes of dysphagia.