掌侧桡腕韧带远端桡骨附着点的 3D 几何形态分析表明，在长臂猿中，腕关节解剖结构与独特的运动行为之间存在关系。
3D geometric morphometric analysis of the distal radius insertion sites of the palmar radiocarpal ligaments indicates a relationship between wrist anatomy and unique locomotor behavior in hylobatids.
机构信息
Unit of Human Anatomy and Embryology, University of Barcelona, Barcelona, Spain.
Institut d'Arqueologia de la Universitat de Barcelona (IAUB), Faculty of Geography and History, University of Barcelona (UB), Barcelona, Spain.
出版信息
Am J Biol Anthropol. 2022 Aug;178(4):647-654. doi: 10.1002/ajpa.24568. Epub 2022 Jun 14.
OBJECTIVES
The objective of this study is to explore the anatomical differences in the insertion sites of the palmar radiocarpal ligaments between hylobatids and other hominoids that may be related to their different locomotor behaviors.
MATERIALS AND METHODS
The morphology of the insertion sites of the palmar radiocarpal ligaments was analyzed with three-dimensional geometric morphometrics (3D GM) in the distal radial epiphysis of 44 hylobatids, 25 Pan, 31 Gorilla and 15 Pongo.
RESULTS
Relative to other hominoids, hylobatid insertion sites of the palmar radiocarpal ligaments were relatively larger and the insertion site of the short radiolunate ligament had a palmar orientation.
DISCUSSION
Larger palmar radiocarpal ligaments in hylobatids can help stabilize the wrist during the radial and ulnar displacement that occurs in ricochetal brachiation, the characteristic locomotor behavior of hylobatids, and compensate for the large traction loads on the wrist during extended-elbow vertical climbing.
目的
本研究旨在探讨掌侧桡腕掌侧韧带在长臂猿与其他原猴类中的附着部位的解剖学差异，这些差异可能与它们不同的运动行为有关。
材料和方法
使用三维几何形态测量学（3D GM）分析了 44 只长臂猿、25 只黑猩猩、31 只大猩猩和 15 只猩猩的远端桡骨骨骺的掌侧桡腕掌侧韧带附着部位的形态。
结果
与其他原猴类相比，长臂猿的掌侧桡腕掌侧韧带附着部位相对较大，短桡月韧带的附着部位具有掌侧方向。
讨论
长臂猿较大的掌侧桡腕掌侧韧带可以帮助稳定手腕，以适应在反弹式臂行时发生的桡骨和尺骨的位移，这是长臂猿的特征性运动行为，并在伸展肘部的垂直攀爬时补偿手腕上的大牵引力。
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