腰椎角度與軀幹肌電訊號之關係

Relationship between Electromyographic Activity of Trunk Muscles and Lumbar Angles

林燕慧(Yang-Hua Lin) ； 邱文科(Wen-Ke Chiou) ； 李永輝(Yueng-Hui Lee) ； 陳文哲(Wen-Jer Chen)

《中華民國物理治療學會雜誌》 22卷4期 (1997/10) Pp. 237-242

https://doi.org/10.29616/JPTAROC.199710.0001

摘要

本研究之目的在終探討最大前屈與後展時軀幹肌電活動與腰椎角度的關連。研究之進行以45位自願受測者接受放射攝影以收集其最大前屈與發展時腰椎角度(L1-L2, L2-L3, L3-L4, L4-L5, L5-S1, L1-S1)的變化，同時量測闊背肌、上背脊肌、下背脊肌、腹直肌、腹斜肌之肌電訊號。肌電訊號以輕鬆直立狀態為休息值，最大前屈與後展各為觀測值，並經正常化後表示為NEMG。以腰椎角度終最大前屈與後展時的變化，與測量之肌電位進行相關分析。結果最大前屈時腰椎角度與闊背肌有顯著相關，除了L1-L2外與上、下背脊肌亦有顯著相關。腹直肌則於L3-L4有明顯相關，而腹斜肌則與所有活動均無顯著之相關。最大後展時所有肌電位與角度變化約為正相關。其中L1-L2之角度變化與闊背肌有顯著相關，L2-L3則與上背脊肌之訊號有顯著相關，下背脊肌電位與L3-L4、L4-L5角度變化呈顯著相關。腹直肌明顯地除L1-L2外約有相關，而腹斜肌肌電訊號明顯相關於L1-L2、L2-L3、L3-L4及L1-S1。由研究中發現軀幹肌肉群於不同姿勢與腰椎角度下呈現顯著的相關。

關鍵字

腰椎 ； 肌電訊號 ； 軀幹

並列摘要

The purpose of this study was to examine the relationship between the electromyographic activity (EMG) of trunk muscles and changes in the intervertebral angles of the lumbar spine. A total of 45 volunteers without any complaint of lower back pain participated in this study. Each subject undertook radiological cinegraphy with three different postures (upright, maximal trunk flexion and maximal trunk extension). EMG were collected at the same positions as were chosen during radiological examination. The muscle groups recorded were latissmus dorsi, erectus spinae (upper portion, and lower portion), rectus abdominalis, and abdominis obliqui. EMG signals were digitized, integrated and normalized (NEMG).
During maximum trunk extension a positive correlation was found between abdominal muscle NEMG and lumbar intervertebral angles. During maximum trunk flexion, on the other hand, showed a negative relationship between back muscle NEMG and lumbar intervertebral angles. Our results also suggest that these relationships were established due to anatomical locations of the respective muscle group and lumbar segament.
relationships were established due to anatomical locations of the respective muscle group and lumbar segament.

並列關鍵字

Lumbar spine ； Electromyography ； Trunk