Vanhoof Marie J M, Galletta Lorenzo, De Groote Isabelle, Vereecke Evie E
Department of Development & Regeneration, Biomedical Sciences Group, KU Leuven Campus Kulak, 8500 Kortrijk, Belgium.
School of Life and Environmental Sciences, Deakin University, 3216 Waurn Pounds, Victoria, Australia.
J Exp Biol. 2023 Sep 15;226(18). doi: 10.1242/jeb.245906. Epub 2023 Sep 22.
This study investigates the maximal range of motion (ROM) during wrist deviation and forearm rotation for five different primate genera and the possible correlation with the shape of the distal ulna, triquetrum and hamate. A two-block phylogenetic partial least square analysis was performed to test this covariation in a phylogenetic context, using shape coordinates and a matrix of maximal ROM data as input data. The results show that gibbons have the highest ROM for both ulnar deviation and supination, whereas Macaca exhibited the lowest ROM for supination, and Pan had the lowest ROM for ulnar deviation. These results can be attributed to differences in locomotor behaviour, as gibbons need a large wrist mobility in all directions for their highly arboreal lifestyle, whereas Macaca and Pan need a stable wrist during terrestrial locomotion. However, we found no correlation between distal ulna/triquetrum/hamate shape and maximal ROM during ulnar deviation and supination in the different primate taxa. A larger dataset, in combination with behavioural and biomechanical studies, is needed to establish form-function relationships of the primate hand, which will aid the functional interpretation of primate fossil remains.
本研究调查了五种不同灵长类属在腕部偏斜和前臂旋转过程中的最大活动范围（ROM），以及与尺骨远端、三角骨和钩骨形状的可能相关性。进行了两模块系统发育偏最小二乘分析，以在系统发育背景下检验这种协变关系，使用形状坐标和最大ROM数据矩阵作为输入数据。结果表明，长臂猿在尺骨偏斜和旋后方面的ROM最高，而猕猴在旋后方面的ROM最低，黑猩猩在尺骨偏斜方面的ROM最低。这些结果可归因于运动行为的差异，因为长臂猿因其高度树栖的生活方式需要在各个方向上有较大的腕部活动度，而猕猴和黑猩猩在陆地运动时需要稳定的腕部。然而，我们发现不同灵长类分类群中尺骨远端/三角骨/钩骨形状与尺骨偏斜和旋后过程中的最大ROM之间没有相关性。需要更大的数据集，结合行为和生物力学研究，来建立灵长类手部的形态-功能关系，这将有助于对灵长类化石遗骸进行功能解释。
