Surface electromyograph activity of submental muscles during swallowing and expiratory muscle training tasks in Huntington鈥檚 disease patients

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• 作者：Alvaro Reyes ; Travis Cruickshank ; Jennifer Thompson ; Mel Ziman ; Kazunori Nosaka
• 关键词：Huntington&rsquo ; s disease ; Submental muscles ; Surface EMG
• 刊名：Journal of Electromyography and Kinesiology
• 出版年：February, 2014
• 年：2014
• 卷：24
• 期：1
• 页码：153-158
• 全文大小：672 K

文摘

Introduction

Huntington鈥檚 disease (HD) patients have difficulty in swallowing, leading to aspiration pneumonia, which is a major cause of death. It seems possible that submental muscles that are crucial for preventing an escape of a bolus into the airway, are affected by HD, but no previous studies have investigated this.

Objective

To assess surface electromyograph (sEMG) activity of submental muscles during swallowing and expiratory muscle training (EMT) tasks in HD patients in comparison to healthy volunteers.

Methods

sEMG activities of submental muscles during saliva, water swallowing, EMT tasks performed at 25% and 75% of maximum expiratory pressure were recorded and normalised by the sEMG activity during an effortful swallow in 17 early to mid stage HD patients and 17 healthy volunteers.

Results

sEMG activity was greater (p < 0.05) during EMT tasks than saliva and water swallowing, but was not significantly different between groups for saliva, water swallowing and EMT at 25%. HD patients had lower sEMG activity for EMT at 75% (p < 0.05).

Conclusion

Decreases in submental muscle activity were not evident in HD patients except during EMT at 75%. This suggests that relative submental muscle weakness is observed only during a high intensity task in early to mid stage HD patients.