Muscle activities during shoulder internal rotation differ in arm position: a preliminary quantitative analysis using positron emission tomography.
Muscle activities during shoulder internal rotation differ in arm position: a preliminary quantitative analysis using positron emission tomography.
复制标题
肩部内旋期间的肌肉活动因手臂位置而异：使用正电子发射断层扫描的初步定量分析。
DOI：
10.1007/s00256-020-03490-0
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Itoi E.
中科院分区：
文献类型：
--
作者：
Matsuzawa G;Sano H;Yamamoto N;Kurokawa D;Watanuki S;Tashiro M;Itoi E.
目的应用正电子发射断层扫描（PET）和磁共振成像（MRI）技术，研究上臂外展0°和90°时盂肱关节内旋时的肌肉活动模式材料与方法：6名健康男性志愿者，在使用弹性带进行主动盂肱内旋运动后进行PET检查，手臂外展0°和90°。作为对照，还进行了静息状态下的PET扫描。在注射18氟脱氧葡萄糖前后进行运动。将每个PET图像与相应的MRI融合以识别每个肌肉。结果外展0°时，运动后肩胛下肌中、下1/3处的标准摄取值（SUV）均显著增加，且高于肩胛下肌上级1/3处（P< 0.05）;肩胛下肌下1/3外展90°时的SUV值显著高于0°时的SUV值，显著高于上级1/3外展90°时的SUV值（P< 0.01）。结论肩胛下肌中下部在外展0°时为主要的肩内旋肌，而肩胛下肌下部在外展90°时为主要的肩内旋肌。
ObjectiveTo investigate the muscle activity patterns of the glenohumeral joint during internal rotation both with the arm at 0° and 90° of abduction using 2-deoxy-2-[18F] fluoro-d-glucose (FDG) positron emission tomography (PET) and magnetic resonance imaging (MRI).Materials and methodsSix healthy male volunteers underwent PET examination after performing active glenohumeral internal rotation exercise using an elastic band both with the arm at 0° and 90° of abduction. As a control, PET scan under resting condition was also performed. The exercise was performed before and after 18 fluorodeoxyglucose injection. Each PET image was fused to the corresponding MRI to identify each muscle. The standardized uptake value (SUV) of each muscle was compared between the two arm positions.ResultsWith the arm at 0° of abduction, the SUV increased significantly after exercise both in the middle and inferior 1/3 of the subscapularis, which were significantly higher than that of the superior 1/3 of the subscapularis (P< 0.05). The SUV of the inferior 1/3 of the subscapularis was significantly higher at 90° of abduction than at 0° of abduction and was significantly higher than that of the superior 1/3 at 90° of abduction (P< 0.01). The SUV after exercise in the inferior infraspinatus and teres minor increased.ConclusionsThe middle and inferior parts of the subscapularis are the main shoulder internal rotators in 0° of abduction, whereas the inferior part of the subscapularis is the main internal rotator in 90° of abduction.