【論文摘要】Effect of Neuromuscular Electrical Stimulation on Humeral Adductors in Subjects With Full-Thickness Rotator Cuff Tear

【論文摘要】旋轉肌群全層斷裂者接受肱骨內收肌之神經肌肉電刺激的效果

Yang-Ting Chien(簡泱庭) ； Che-Yuan Chang(張哲源) ； Chung-Hsun Chang(張宗訓) ； Jing-Lan Yang(楊靜蘭) ； Po-Tsun Chen(陳柏村) ； Jiu-Jenq Lin(林居正)

《物理治療》 48卷2期 (2023/06) Pp. 127-128

https://doi.org/10.6215/FJPT.202306.O27

摘要

Background and Purpose: Contraction of teres major (TM) and pectoralis major (PM) may pull the humerus downwardly from impingement in subjects with full-thickness rotator cuff tear. We investigated the effects of neuromuscular electrical stimulation (NMES) on TM and PM for the acromiohumeral distance (AHD) and scapular kinematics in these subjects. Methods: Thirty rotator cuff tear subjects were recruited and recorded outcomes before stimulation and during NMES on TM and PM. We measured the AHD by ultrasonography and scapular kinematics during arm elevation by three-dimensional electromagnetic motion analyses. Additionally, TM and PM activation ratios were calculated pre- and post- NMES immediately at the 60% maximum isometric force. Results: During arm elevation, the AHD were significant higher during NMES on TM comparing to no NMES (0.43-0.88 mm, p < 0.001). In resting position, the AHD were significant lower in NMES on PM than no NMES (0.78 mm, p < 0.001). Besides, the scapular upward rotation during arm elevation were greater when NMES on TM compared with those when NMES on PM (1.32-3.36°, p ≤ 0.001). Despite NMES or not, activation ratios of TM were significantly lower than those of PM (p < 0.05). Conclusions: NMES on TM can increase scapular upward rotation and AHD during arm elevation in these subjects. Additionally, the decreased scapular upward rotation with NMES on PM can be associated with possible subacromial impingement. Clinical Relevance: Contraction of TM plays an important role for subjects with full-thickness rotator cuff tear. NMES on TM can improve scapular kinematics and AHD to avoid impingement in these subjects.