ROLE OF SUPRASPINATUS IN THE QUADRUPEDAL LOCOMOTION OF VERVETS (CERCOPITHECUS-AETHIOPS) - IMPLICATIONS FOR INTERPRETATION OF HUMERAL MORPHOLOGY
ROLE OF SUPRASPINATUS IN THE QUADRUPEDAL LOCOMOTION OF VERVETS (CERCOPITHECUS-AETHIOPS) - IMPLICATIONS FOR INTERPRETATION OF HUMERAL MORPHOLOGY
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DOI：
10.1002/ajpa.1330790313
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发表时间：
1989-07-01
影响因子：
2.8
通讯作者：
STERN, JT
中科院分区：
文献类型：
--
作者：
LARSON, SG;STERN, JT
许多研究者已经注意到，陆生和树栖猴的肱骨大结节在肱骨头轮廓之外向近端突出的程度往往不同。这些差异与四足运动过程中冈上肌的杠杆要求不同有关。虽然乔利（狒狒在医学研究，第二卷，pp. 23-50，1967）提出，突出的结节可能与冈上肌更精确地控制在四足动物的支撑阶段期间发生的被动肱骨缩回的能力有关，大多数工作者强调这种骨骼特征与在陆地四足动物的摆动阶段期间前肢的有力或快速前伸的需要之间的联系。我们报告的冈上肌功能的肌电图分析表明，肌肉不作为一个肱量角器在四足动物，即使在相对curorial黑长尾猴。我们认为，在更大的结节投影的差异可以与肩关节的活动度，冈上肌的大小是由更大的结节高度，适应性的重要性，肱抬高，和身体大小的相互作用。
Various researchers have noted that terrestrial and arboreal monkeys often differ in the degree to which the greater tubercle of the humerus projects proximally beyond the profile of the humeral head. These differences have been associated with differing leverage requirements for supraspinatus during quadrupedal locomotion. Although Jolly (The Baboon in Medical Research, Vol. II., pp. 23-50, 1967) suggested that a projecting tubercle can be related to the ability of supraspinatus to control more exactly the passive humeral retraction that occurs during support phase of quadrupedalism, most workers emphasize a link between this bony trait and the need for powerful or rapid protraction of the forelimb during swing phase of terrestrial quadrupedalism. We report on an EMG analysis of supraspinatus function showing that the muscle does not act as a brachial protractor during quadrupedalism, even in the relatively cursorial vervet monkey. We suggest that differences in greater tubercle projection can be related to the degree of mobility of the shoulder, and that supraspinatus size is determined by the interaction of greater tubercle height, adaptive importance of brachial elevation, and body size.