Semicircular Canal Size and Locomotion in Colobine Monkeys: A Cautionary Tale

Semicircular Canal Size and Locomotion in Colobine Monkeys: A Cautionary Tale
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疣猴的半规管大小和运动:一个警示故事

DOI:
10.1159/000449286
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发表时间:
2016
影响因子:
1.9
通讯作者:
Hirasaki E.
Hirasaki E.
中科院分区:
生物学4区
文献类型:
--
作者:
Rae TC;Johnson PM;Yano W;Hirasaki E.

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内耳的半规管构成了平衡器官,在运动过程中跟踪头部的旋转,有助于稳定视力。椎管的形态特征与与运动相关的敏捷性分数相关。然而,到目前为止,管道形态和特定运动行为(如跳跃)之间的关系尚不清楚。对这种关系的了解可能会加强已灭绝类群移动的推断。为了验证这一点,使用显微计算机断层扫描技术研究了两组关系密切的灵长类物种(长臂猿和波滕齐亚尼;Colobus guereza和C.Polykomos)的头盖骨,它们的运动技能跳跃百分比不同。建立了骨迷路的三维虚拟模型,并根据颅骨大小计算了三个根管的曲率半径。这些发现是相互矛盾的;一种跳跃形式(P.melalophos)与其同类的不同之处在于拥有明显更大的侧管,这是以前对灵长类动物的研究中看到的模式,而另一种跳跃形式(C.guereza)的后管比其近亲的要小得多。这些结果破坏了从已灭绝的灵长类动物的骨骼迷宫中确定特定运动行为的努力。
The semicircular canals of the inner ear constitute the organ of balance, tracking head rotation during movement and facilitating stabilisation of vision. Morphological characteristics of the canals are correlated with agility scores related to locomotion. To date, however, the relationship between canal morphology and specific locomotor behaviours, such as leaping, is unclear. Knowledge of such a relationship could strengthen the inferences of locomotion of extinct taxa. To test this, crania of two sets of closely related primate species (Presbytis melalophos and P. potenziani; Colobus guereza and C. polykomos) that differ in the percentage of leaping in their locomotor repertoire were examined using microscopic computed tomography. Three-dimensional virtual models of the bony labyrinth were derived, and the radius of curvature of each of the three canals was evaluated relative to cranial size. The findings are contradictory; one leaping form (P. melalophos) differs from its congener in possessing significantly larger lateral canals, a pattern seen in previous studies of primates, while the other leaper (C. guereza) has significantly smaller posterior canals than its close relative. These results undermine efforts to determine specific locomotor behaviours from the bony labyrinth of extinct primates.
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