Effects of different arm external loads on the scapulo-humeral rhythm
Effects of different arm external loads on the scapulo-humeral rhythm
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DOI：
10.1016/s0268-0033(00)00055-3
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发表时间：
2000-01-01
影响因子：
1.8
通讯作者：
Carita, I
中科院分区：
文献类型：
--
作者：
Pascoal, AG;van der Helm, FFCT;Carita, I
Objective.研究施加在手上的外部负荷的大小对肩带方向（肩胛-肱骨节律）的影响。设计。30名受试者在三个抬高平面进行双臂抬高：矢状面（前屈）、额状面（外展）和肩胛面（肩胛）。在每个高度平面上对五个水平的外部负荷（0- 4kg）进行测量。对于外加负荷是否影响SHR存在争议。此外，没有数据可在SHR手臂外展和前屈。用六自由度电磁跟踪装置记录SHR。施加于手部的外部载荷影响肩胛骨的三维位置：肩胛骨前伸对外展和肩胛骨后移的影响尤为显著;肩胛骨侧旋对前屈和外展的影响尤为显著;肩胛骨脊柱倾斜对前屈的影响尤为显著。施加在手上的外部负荷的大小影响肩胛骨的位置和肩胛-肱骨节律，特别是外展。这些影响在前屈时肩胛骨的侧向旋转和脊柱倾斜，以及在scaption.Additionally肩胛骨的前伸上是可见的，肩带的初始位置似乎在个体SHR模式的定义上起着重要的作用。
Objective. To investigate the effects of the magnitude of the external load, applied on the hand, on the orientation of the shoulder girdle (scapulo-humeral rhythm).Design. Thirty subjects performed both arms' elevation in three planes of elevation: sagittal (anteflexion), frontal (abduction), and scapular (scaption). Measurements were performed against five levels of external load (0-4 kg), on each plane of elevation.Background. Some controversy exists whether additional load influences the SHR. Moreover, no data are available on the SHR during arm abduction and anteflexion.Method's. The SHR was recorded by means of a six degree of freedom electromagnetic tracking device.Results. The external load applied on the hand affects scapular three-dimensional position: scapular protraction is particularly affected on abduction and scaption; scapular latero-rotation on anteflexion and abduction; and scapular spinal tilt on anteflexion.Conclusion. The magnitude of the external load, applied on the hand, influences the scapular position and the scapulo-humeral rhythm, particularly on abduction. Those effects are visible on scapular latero-rotation and spinal tilt, during anteflexion, and on scapular protraction during scaption.Additionally, the initial position of the shoulder girdle seems to play an important role on the definition of the individual SHR pattern.