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Related Experiment Video

Updated: Feb 18, 2026

Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing
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Evaluation of normal swallowing functions by using dynamic high-density surface electromyography maps.

Mingxing Zhu1, Bin Yu2, Wanzhang Yang3

  • 1Chinese Academy of Science (CAS) Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Shenzhen, 518055, China.

Biomedical Engineering Online
|November 22, 2017
PubMed
Summary

High-density surface electromyography (HD sEMG) maps visualize muscle activity during swallowing. This technique offers a comprehensive assessment of normal swallowing function and may aid in identifying swallowing disorders.

Keywords:
Energy mapsHigh-density surface electromyographyMuscle contractionsNormal swallowingSwallowing effort

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Area of Science:

  • Biomechanics
  • Physiology
  • Biomedical Engineering

Background:

  • Swallowing is a complex, continuous muscular process vital for daily life.
  • Understanding normal swallowing mechanics is crucial for diagnosing related disorders.

Purpose of the Study:

  • To introduce a novel high-density surface electromyography (HD sEMG) technique for evaluating normal swallowing.
  • To visualize and analyze muscle activity patterns during the swallowing process.

Main Methods:

  • Utilized 96 electrodes on the neck to record myoelectric signals from 12 healthy subjects during swallowing tasks.
  • Constructed HD sEMG energy maps from root mean square values to visualize muscle activity.
  • Investigated the impact of bolus volume, viscosity, and head posture on swallowing using these energy maps.

Main Results:

  • HD sEMG energy maps effectively displayed detailed spatial and temporal muscle activity during swallowing.
  • Swallowing time and effort were significantly influenced by bolus volume and viscosity.
  • Head posture changes altered the spatial distribution of muscle activity.

Conclusions:

  • The proposed HD sEMG method provides a comprehensive physiological evaluation of normal swallowing dynamics.
  • This technique offers an alternative for assessing muscle coordination in time and location.
  • HD sEMG shows potential as a tool for rapid screening and objective assessment of swallowing disorders like dysphagia.