Related Experiment Video
Updated: May 7, 2026
Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing
Published on: December 1, 2023
[Surface electromyographic activities of submental muscles among stroke patients with dysphagia]
Ling-jun Xiao1, Jing-jing Xue, Tie-bin Yan
1Department of Rehabilitation Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China.
Objective:
To explore the swallowing functions of stroke patients with dysphagia.
Methods:
A total of 41 subjects were recruited.There were 15 stroke patients with dysphagia, 12 stroke patients without swallowing disorders and 14 age-and gender-matched healthy controls.Surface electromyography (sEMG) was employed over the suprahyoid muscle group.Single swallow was applied twice with 5 and 10 ml of thin liquid barium as well as 5 and 10 ml of paste barium.The duration, average amplitude of sEMG and peak amplitude of submental muscle contraction were compared among three groups.Three-way analysis of variance (ANOVA) was performed.
Results:
No significant differences existed in the general data among three groups (P > 0.05).However, all volumes, consistencies and durations [ (1.38 ± 0.21), (1.66 ± 0.30), (1.46 ± 0.24), (1.78 ± 0.28) s] were significantly longer for the group of dysphagia patients than for those without dysphagia and healthy subjects (P < 0.05).And the average amplitudes ( (16 ± 6), (15 ± 5), (20 ± 13), (19 ± 7) µV) were significantly smaller for the group of dysphagia patients than for those without dysphagia and healthy subjects (P < 0.05) while the peak amplitudes ((48 ± 23), (51 ± 23), (51 ± 31), (63 ± 32) µV) were significantly smaller for the group of dysphagia patients than for those without dysphagia and healthy subjects (P < 0.05). There were no significant differences between patients without dysphagia and those of healthy subjects (P > 0.05).
Conclusion:
As a simple and useful tool, sEMG is feasible for evaluating swallowing function and quantifying the strength of swallowing muscles in post-stroke patients with dysphagia.
