Abstract：
OBJECTIVE: Understanding how the main scapular muscles behave in overhead athletes with scapular dyskinesis (SD).
METHODS: Systematic Review.
METHODS: Electronic searches were performed in Pubmed (MedLine), Embase, CINAHL, and SPORTDiscus databases.
METHODS: Overhead athletes with SD.
METHODS: Electromyographic activity of the upper (UT), middle (MT), and lower (LT) trapezius, and serratus anterior (SA).
RESULTS: Eight studies were included in this review. The UT activity showed a tended to increase its activity mainly during tasks over 90° compared to 45°. SA activity had similar behavior, mainly during isometric tasks. The MT also increased its activity mainly in tasks with overhead angulations when compared to lower angulations. The LT activation tended to decrease its EMG activity at angulations below 60° in overhead athletes with SD.
CONCLUSIONS: The EMG behaviour of UT and SA for non-athletes appears to differ from what has already been described in the literature. The MT seems to be the most neglected muscle for scapular stabilization in overhead athletes with SD. The decrease in LT activity suggests that this may have implications for the performance of these athletes.
METHODS: Systematic Review.
METHODS: Electronic searches were performed in Pubmed (MedLine), Embase, CINAHL, and SPORTDiscus databases.
METHODS: Overhead athletes with SD.
METHODS: Electromyographic activity of the upper (UT), middle (MT), and lower (LT) trapezius, and serratus anterior (SA).
RESULTS: Eight studies were included in this review. The UT activity showed a tended to increase its activity mainly during tasks over 90° compared to 45°. SA activity had similar behavior, mainly during isometric tasks. The MT also increased its activity mainly in tasks with overhead angulations when compared to lower angulations. The LT activation tended to decrease its EMG activity at angulations below 60° in overhead athletes with SD.
CONCLUSIONS: The EMG behaviour of UT and SA for non-athletes appears to differ from what has already been described in the literature. The MT seems to be the most neglected muscle for scapular stabilization in overhead athletes with SD. The decrease in LT activity suggests that this may have implications for the performance of these athletes.
摘要：
目的：了解肩胛骨肌肉在肩胛骨发育不良（SD）的头顶运动员中的主要表现。
方法：系统评价。
方法：在Pubmed（MedLine）中进行电子搜索，Embase,CINAHL,和SPORTDiscus数据库。
方法：具有SD的高架运动员。
方法：上部（UT）的肌电图活动，中间（MT），和下（LT）斜方肌，和前锯肌（SA）。
结果：本综述纳入了8项研究。与45°相比，UT活性显示出主要在90°以上的任务期间倾向于增加其活性。SA活性也有类似的行为，主要是在等距任务期间。与较低的角度相比，MT还主要在具有高架角度的任务中增加了其活动。在患有SD的高架运动员中，LT激活倾向于在60°以下的角度降低其EMG活性。
结论：非运动员的UT和SA的EMG行为似乎与文献中已经描述的不同。在患有SD的头顶运动员中，MT似乎是肩胛骨稳定最被忽视的肌肉。LT活动的减少表明这可能对这些运动员的表现产生影响。
方法：系统评价。
方法：在Pubmed（MedLine）中进行电子搜索，Embase,CINAHL,和SPORTDiscus数据库。
方法：具有SD的高架运动员。
方法：上部（UT）的肌电图活动，中间（MT），和下（LT）斜方肌，和前锯肌（SA）。
结果：本综述纳入了8项研究。与45°相比，UT活性显示出主要在90°以上的任务期间倾向于增加其活性。SA活性也有类似的行为，主要是在等距任务期间。与较低的角度相比，MT还主要在具有高架角度的任务中增加了其活动。在患有SD的高架运动员中，LT激活倾向于在60°以下的角度降低其EMG活性。
结论：非运动员的UT和SA的EMG行为似乎与文献中已经描述的不同。在患有SD的头顶运动员中，MT似乎是肩胛骨稳定最被忽视的肌肉。LT活动的减少表明这可能对这些运动员的表现产生影响。
