Quantitative assessment of geniohyoid before and after rehabilitation in stroke patients with dysphagia by ultrasound.
Jun Liu, Lin Gu, Li Huang and 2 others
Six weeks of electrical stimulation to the throat muscles improved how far and how fast the geniohyoid muscle moved during swallowing in 30 stroke patients.
Movement distance was no longer different from healthy adults, but speed and timing still were.
Key findings
1Before treatment, stroke patients showed reduced geniohyoid displacement, slower velocity, and longer movement duration compared with healthy controls.
2After six weeks of NMES combined with active swallowing, all three kinematic parameters improved significantly. Displacement reached parity with controls, but velocity and duration remained significantly worse than healthy adults.
3The Dysphagia Outcome and Severity Scale score improved from 3.2 to 5.1 after treatment.
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What it does not show
No control treatment group: all 30 patients received the same NMES, so part of the improvement may reflect natural neurological recovery rather than the stimulation itself. No randomisation and no blinding of participants to treatment. Modest sample size (30 patients) and a short six-week observation window, which the authors note precluded tracking through complete functional recovery. The healthy control group was recruited from community screening, so the comparison reflects a best-case baseline rather than a typical post-stroke trajectory.
Declared interests
Funded by the Shanghai Huangpu District Health Commission (HLM202413). The authors declared that financial support was received for the work and/or its publication. No device manufacturer is named as a funder, though the NMES device used was a VitalStim Plus (Chattanooga Group).
The easy way to misread this
Do not read the improvement as proof that NMES caused it. There was no control treatment group, and the authors themselves state that spontaneous neurological recovery cannot be excluded. Also, while movement distance normalised, speed and timing remained significantly worse than healthy adults, so the swallowing deficit was not fully resolved.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →