Oman R E, Sullivan S J, Fleury J, Dutil E
Centre de Recherche, Institut de Réadaptation de Montréal, Quebec, Canada.
Biofeedback Self Regul. 1989 Dec;14(4):339-46. doi: 10.1007/BF00999125.
An elderly hemiplegic patient participating in an EMG biofeedback training program was observed to produce a synergistic flexion movement of the plegic (determined by functional evaluations) upper limb while yawning. In the course of the training sessions the electrical activity of the anterior deltoid (the target muscle) was recorded during yawning. These peak EMG values were greatly facilitated in comparison with the session mean peak values obtained during an attempted maximum voluntary isometric contraction (shoulder flexion) of the same limb (e.g., Trial 1: 85.00 vs. 4.33 microV). The possibility of yawning as a confounding variable in EMG biofeedback studies is presented and discussed.
观察到一名参与肌电图生物反馈训练项目的老年偏瘫患者在打哈欠时，其瘫痪（根据功能评估确定）上肢出现协同屈曲运动。在训练过程中，记录了打哈欠时三角肌前部（目标肌肉）的电活动。与同一肢体进行最大自主等长收缩尝试（肩部屈曲）时获得的各训练时段平均峰值相比，这些肌电图峰值显著增加（例如，试验1：85.00微伏对4.33微伏）。本文提出并讨论了打哈欠作为肌电图生物反馈研究中混杂变量的可能性。
