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Related Experiment Video

Updated: Jun 21, 2026

Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing

Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing

Published on: May 6, 2014

Maximal hyoid excursion in poststroke patients.

Youngsun Kim¹, Gary H McCullough

¹Ohio University, Grover Center, Athens, 45701-2979, USA. kimy2@ohio.edu

|August 6, 2009

Summary

Hyoid bone displacement during swallowing does not significantly differ between stroke patients who aspirate and those who do not. Swallowing impairment after stroke may stem from delayed pharyngeal swallow triggering rather than reduced hyoid movement.

Area of Science:

Neurology
Swallowing Physiology
Biomechanical Analysis

Background:

Aspiration after stroke is often linked to reduced hyoid bone excursion.
Hyoid displacement is crucial for airway protection and upper esophageal sphincter (UES) opening during swallowing.

Purpose of the Study:

To investigate differences in hyoid bone's vertical and anterior displacement during swallowing in stroke patients.
To compare these displacements between stroke patients who aspirate and those who do not.

Main Methods:

Analysis of hyoid bone displacement (vertical and anterior) in 16 aspirating and 33 non-aspirating stroke patients.
Evaluation using 5- and 10-ml thin-liquid boluses and ImageJ software.
Statistical analysis using a two-way analysis of variance (ANOVA) with group and volume as factors.

Related Experiment Videos

Last Updated: Jun 21, 2026

Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing

Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing

Published on: May 6, 2014

Main Results:

No significant differences were found in maximal vertical or anterior hyoid displacement between aspirating and non-aspirating stroke patients.
Maximal anterior hyoid displacement was marginally greater in non-aspirators compared to aspirators.
The extent of hyoid excursion did not correlate significantly with aspiration status.

Conclusions:

Reduced maximal hyoid excursion is unlikely to be the primary cause of aspiration in stroke patients.
Aspiration before or during swallowing in stroke survivors may be more associated with the timing of pharyngeal swallow initiation than the degree of hyoid movement.