Effect of orofacial myofunctional exercise on the improvement of dysphagia patients' orofacial muscle strength and diadochokinetic rate.
Haewon Byeon
PMID 27799705WHAT IT FOUND
Stroke patients with swallowing problems improved more in tongue, cheek, lip strength and rapid /Pa/ and /Ta/ sounds when orofacial exercises were added to temperature-tactile stimulation.
The study did not test orofacial exercise alone.
Key findings
01The experimental group, which received both orofacial myofunctional exercise and temperature-tactile stimulation, improved more in tongue elevation, tongue protrusion, cheek compression, lip compression, and alternating motion rate than the control group, which received temperature-tactile stimulation alone.
02Tongue elevation in the experimental group rose from 20.8 ± 13.2 kPa to 26.8 ± 14.3 kPa, while the control group rose from 18.5 ± 11.5 kPa to 21.5 ± 10.8 kPa.
03Alternating motion rate for /Pa/ rose from 3.83 ± 0.4 to 4.51 ± 0.5 cycles per second in the experimental group and from 3.91 ± 0.4 to 4.07 ± 0.4 cycles per second in the control group.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
All participants were within 6 months of stroke diagnosis, so natural recovery could explain some of the change. The treatment period was only 3 weeks, so long-term effects are unknown. The experimental group received both orofacial exercise and temperature-tactile stimulation, so the study cannot show what orofacial exercise alone would do. The outcomes were oral muscle pressure and sound repetition, not a direct measure of swallowing safety. The paper does not report blinding of participants, therapists, or outcome raters.
The easy way to misread this
Do not conclude that orofacial exercise alone caused the improvement. Every participant received temperature-tactile stimulation, and the experimental group received both treatments. The study also measured muscle strength and sound repetition, not whether swallowing became safer.