Voice Change Associated with Swallowing Disorder Caused by a Stroke After Neuromuscular Electrical Stimulation

The purpose of this study was to look into changes in voice using acoustic analysis during the process of neuromuscular electircal stimulation targeting dysphagia treatment. Fifteen man with dysphagia caused by stroke was treated neuromuscular electrical stimulation for two months and intensity of voice, F0, Jitter, Shimmer, NNE were measured. The results of this study that improvement in functions of dysphagia and Jitter, Shimmer were stabilized. But there was not significantly changes of F0. NNE was improved after the intervention, but still showed abnormal levels. This result suggests a possibility of effects that Neuromuscular electrical stimulation has on stabilization of Jitter, Shimmer and intensity of voice.