Highlights
- •Professionals assess swallowing function in detail in patients with dysphagia.
- •Submental muscles and hyoid movement function are impaired in patients.
- •There is a loss of synergy between the submental muscles and hyoid movement.
Abstract
Background
Dysphagia is one of the common complications after stroke. Dysphagia significantly
increases the probability of serious adverse consequences. The purpose of this study
was to compare the characteristics of submental muscles electromyography and hyoid
motion parameters between patients with dysphagia after stroke and healthy controls,
and whether there is a synergistic effect between the function of the submental muscles
and the movement of the hyoid.
Methods
Fifteen patients with post-stroke dysphagia and fifteen healthy adults simultaneously
underwent the videofluoroscopic and surface electromyography of the submental muscles
while swallowing 5 ml of concentrated liquid barium sulphate. The electromyographic
signal of the submental muscles was analysed along with parameters of hyoid movement.
Findings
Stage transition duration and duration of surface electromyographic activity were
extended significantly in post-stroke dysphagia patients(P < 0.05). Surface electromyography amplitude and hyoid movement were significantly
reduced in patients (P < 0.05). There was a significant correlation between the maximum hyoid movement distance
and the peak sEMG amplitude in healthy controls (r = 0.660, P = 0.014), but not in patients with dysphagia after stroke (r = 0.425, P = 0.148).
Interpretation
Submental muscles electromyographic signal changes in patients may be the result of
uncoordinated muscle contractions and decreased muscle strength. Furthermore, the
reduced hyoid movement distance may be due to impaired function of the submental muscles.
In addition, the submental muscles and hyoid movement or other swallowing structures
functions were impaired to varying degrees, resulting in the disappearance of the
correlation between the maximum movement distance of the hyoid and the peak amplitude.
Keywords
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Article info
Publication history
Published online: September 26, 2022
Accepted:
September 23,
2022
Received:
March 18,
2022
Identification
Copyright
© 2022 Elsevier Ltd. All rights reserved.