文章基本信息

标题：MUSCLE ACTIVITY OF SHOULDER JOINTS IN PATIENTS WITH MULTIDIRECTIONAL SHOULDER INSTABILITY DURING PULL, FORWARD PUNCH, ELEVATION AND OVERHEAD THROW
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作者：Árpád Illyés, Rita M. Kiss
期刊名称：Facta Universitatis : Series Physical Education and Sport
印刷版ISSN：1451-740X
出版年度：2005
卷号：3
期号：01
页码：93-105
出版社：University of Niš
摘要：Multidirectional shoulder joint instability alters the role of dynamic stabilizers, as a result of which the motion patterns of muscles surrounding the shoulder joint are also changed. The aim of this study was to compare the muscle activity of patients with multidirectional shoulder instability and the control group during pull, forward punch and elevation and during overhead throw. Fifteen subjects with multidirectional shoulder instability and fifteen control subjects with normal, healthy shoulders participated in the study. Both shoulders were tested in all subjects. Signals were recorded by surface EMG from eight different muscles during pull, forward punch, elevation and overhead throw. The maximum values of normalized voluntary electrical activity, and the time span among peak muscle electrical activities in percent of total time of a movement cycle were compared with those of the healthy control group. Test results suggest that in the case of patients with multidirectional shoulder instability the different motions are performed in a different way. The results give rise to the assumption that the organism will attempt to ensure centralization of the glenohumeral joint and the reduction of instability is attempted to be ensured by the organism through increasing the role of rotator cuff muscles and decreasing the role of m. deltoideus, m. biceps brachii, and m. pectoralis maior. The analysis of time span shows that in the case of patients with multidirectional shoulder instability, the time difference between the peaks of normalized voluntary electrical activity of the patients is significantly greater than those of the control group. It can be established that the neuromuscular control and proprioception of patients with multidirectional shoulder instability differ from those of the control group.
关键词：shoulder joint, multidirectional instability, electromyography, motion pattern.