Kinematic and muscle activity characteristics of multidirectional shoulder joint instability during elevation
Kinematic and muscle activity characteristics of multidirectional shoulder joint instability during elevation
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DOI：
10.1007/s00167-005-0012-7
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发表时间：
2006-07-01
影响因子：
3.8
通讯作者：
Kiss, Rita M.
中科院分区：
文献类型：
--
作者：
Illyés, Arpad;Kiss, Rita M.
肩部运动的改变被认为与肩部疾病有关。本研究的目的是进行三维运动分析（运动学和肌电图）的骨骼元素和肌肉的肩关节多方向不稳定的患者。15例多向不稳定患者和15名正常对照者在肩胛平面连续抬高期间进行了研究。通过超声运动分析仪对肩部16个解剖点的空间坐标进行量化，以确定运动学参数。用表面肌电描记法测定12块肌肉的活动。通过肩胛胸、盂肱和肱骨仰角;角度范围;肩胛胸和盂肱节律;肩胛胸、盂肱和肩胛盂比率;以及肱骨和肩胛骨旋转中心之间的相对位移来确定运动的运动学特征。运动的肌电图特征由肌肉活动的开-关模式来建模。在患者和无症状志愿者之间观察到运动学参数的显着变化。肩胛骨和肱骨旋转中心之间的相对位移可以正确地模拟肩关节前、后、下脱位和多向不稳定。活动时间短，m。胸大肌和肌的所有三个部分。三角肌和较长的活动由M.冈上肌肱二头肌和m.冈下肌确保肩关节盂肱骨头的集中，具有多方向不稳定性。
Alterations of shoulder motion have been suggested to be associated with shoulder disorders. The objective of this study was to perform a 3D motion analysis (kinematic and electromyographical) of skeletal elements and muscles of shoulder joint in patients with multidirectional instability. Fifteen patients with multidirectional instability and 15 normal controls were investigated during continuous elevation in the scapular plane. The spatial coordinates of 16 anatomical points of the shoulder to determine kinematical parameters were quantified by an ultrasound-based motion analyzer. The activities of 12 muscles were measured by surface electromyography. Kinematic characteristics of motion were identified by scapulothoracic, glenohumeral, and humeral elevation angles; range of angles; scapulothoracic and glenohumeral rhythm; scapulothoracis, glenohumeral, and scapuloglenoid ratios; and the relative displacement between the rotation centers of the humerus and the scapula. The electromyographical characteristics of motion were modeled by the on-off pattern of muscle activity. Significant alterations in kinematical parameters were observed between patients and asymptomatic volunteers. The anterior, posterior, and inferior dislocations of shoulders with multidirectional instability could be properly modeled by the relative displacement between the rotation centers of the scapula and humerus. The shorter activity by m. pectoralis maior and all three parts of m. deltoideus and longer activity by m. supraspinatus, m. biceps brachii, and m. infraspinatus assure the centralization of the glenuhumeral head of a shoulder with multidirectional instability.