Department of Occupational Therapy, The Graduate School, Yonsei University, Kangwon-do 220-710, Republic of Korea.
Ind Health. 2010;48(1):108-14. doi: 10.2486/indhealth.48.108.
The purpose of this study was to observe changes in electromyographic activity appeared in shoulder and scapular muscles when one wears no wrist extension orthosis, short wrist extension orthosis and long wrist extension orthosis when performing two model assembling operations. The study subjects were 16 adults who use right hand and did not have any functional disorder on their wrist or the upper limbs without any orthopedic surgery. The study subjects were asked to do the two model assembling operations without wrist extension orthosis, with a short wrist extension orthosis and with a long wrist extension orthosis. As a result of repetitive assembling operation that requires shoulder movement, electromyographic activity in upper trapezius and serratus anterior increased significantly when the subjects wore the short and long wrist extension orthoses compared to none. When the subjects performed repetitive assembling operation that requires shoulder stability, electromyographic activity in upper trapezius, lower trapezius, serratus anterior, and anterior deltoid showed significant increase when they wore the short and long wrist extension orthoses compared to none. Especially, the upper trapezius showed significantly high electromyographic activity when they wore the long wrist extension orthosis compared to a short one.
本研究旨在观察在进行两种模型组装作业时，当不佩戴、短款和长款腕伸矫形器时，肩部和肩胛带肌肉的肌电图活动变化。研究对象为 16 名右手使用的成年人，他们的手腕或上肢没有任何功能障碍，也没有接受过任何骨科手术。研究对象被要求在不佩戴腕伸矫形器、佩戴短款腕伸矫形器和佩戴长款腕伸矫形器的情况下进行两种模型组装操作。由于需要肩部运动的重复组装操作，当研究对象佩戴短款和长款腕伸矫形器时，斜方肌上部和前锯肌的肌电图活动与不佩戴时相比显著增加。当研究对象进行需要肩部稳定性的重复组装操作时，斜方肌上部、下部、前锯肌和三角肌前部的肌电图活动与不佩戴时相比显著增加，当研究对象佩戴短款和长款腕伸矫形器时更是如此。特别是斜方肌上部在佩戴长款腕伸矫形器时的肌电图活动显著高于佩戴短款腕伸矫形器时。
