Mysnyk M C, Johnson D E
Steindler Orthopedic Clinic, Iowa City, IA 52240.
Clin Orthop Relat Res. 1991 Apr(265):183-6.
Deficiency of the pectoralis major is a relatively common muscle anomaly. There is little documentation, however, of what, if any, functional deficit the anomaly imparts. Therefore, two highly successful amateur wrestlers with unilateral congenital absence of the pectoralis minor and sternocostal head of the pectoralis major are reported. Cybex testing revealed no appreciable decrease in shoulder internal rotation strength but did show a 20%-30% decrease in shoulder horizontal adduction strength. Other patients similarly affected can be advised that their shoulder strength will be slightly decreased, but significant functional limitations are unlikely.
胸大肌缺损是一种相对常见的肌肉异常。然而，关于这种异常会带来何种功能缺陷（如果有的话），相关文献记载很少。因此，本文报告了两名非常成功的业余摔跤运动员，他们单侧先天性胸小肌和胸大肌胸肋头缺失。Cybex测试显示，肩部内旋力量没有明显下降，但肩部水平内收力量确实下降了20%-30%。可以告知其他有类似情况的患者，他们的肩部力量会略有下降，但不太可能出现明显的功能受限。
