The Application Of Surface Electromygraphy In Functional Assessment Of Patients With Post-stroke Pharyngeal Dysphagia

Objective: To investigate any difference of amplitude and duration in submentalmuscles and infrahyoid muscles actibities during pharyngeal swallowing betweennormal adults and post-stroke dysphagia with surface electromyography techniqueand analysis system.Methods: The clinical dates confirmed PSD、30controls of healthy were collected.ME6000-T8-type sEMG machine were used to collecte sEMG of two groups inresting state、saliva swallow and wet swallow，therefore，calculating the averageamplitude and duration.Results:①In resting state：there were no statistical difference in the averageamplitude of submental and infrahyoid muscles between cases group and controlgroup（P﹥0.05）；In case group：statistical differences were not observed in theamplitude between submental muscles and infrahyoid muscles；In control group：there were no statistical difference in the average amplitude between submentalmuscles and infrahyoid muscles；②During dry swallowing：the results indicated thatthe average amplitude of submental and infrahyoid muscles in case group weresignificantly lower than control group; and the duration of submental and infrahyoidmuscles were significantly lower, with statistical difference（P﹤0.05）.③During wetswallowing(swallow “5ml” water): the average amplitude of submental andinfrahyoid muscles in control group were significantly higher than case group（P﹤0.005）; and the duration of submental and infrahyoid muscles were significantlyprolonger than case group（p﹤0.001）；④Intra-group comparison：in control group，statistically differences were not observed in the amplitude and duration betweensubmental muscles and infrahyoid muscles；in case grou，just as the comparisonresults.Conclusions: sEMG could be used as a non-invasive、simple、rapid tool in detectingthe sEMG activities of related muscles during pharyngeal swallowing. The averageamplitude and duration of submental and infrahyoid muscles not only can screen andevaluate swallowing function prelimnary，but also can reflect the ease or complexity and the evevation persistence time of the hyoid bone and the larynx in evevationmovement respectively, evaluating the neuromuscular function，predicting the risk ofaspiration of patients.