大象的干尖肌肉体反映了物种在抓住行为上的差异
Lennart Eigen1, Pius Ladenburger1, Blaž Brence2
1Humboldt University Berlin, Bernstein Center for Computational Neuroscience Berlin, Philippstr. 13, Haus 6, Berlin, Germany.
Communications biology
|December 8, 2025
概括
大象干尖在肌肉结构上有所不同,这影响了非洲大象 (Loxodonta africana) 和亚洲大象 (Elephas maximus) 如何抓住物体. 这项研究揭示了与特定物种行为相关的独特肌肉安排.
科学领域:
- 动物学 动物学
- 比较解剖学的比较解剖学
- 生物力学 生物力学
背景情况:
- 大象 (Loxodonta africana,Elephas maximus) 使用其干部进行各种任务,在干部尖形态和抓取行为上观察到特定物种的差异.
- 非洲大草原大象使用捏握,而亚洲大象使用包裹和向后紧的技术.
研究的目的:
- 为了研究非洲大草原大象和亚洲大象之间干尖肌肉结构的潜在差异.
- 为了确定肌肉结构是否与观测到的大象物种之间抓住行为的变化相关.
主要方法:
- 在三只非洲象 (Loxodonta africana) 和三只大象 (Elephas maximus) 标本的半干尖上进行了密集肌肉束重建.
- 应用了手动和自动细分技术的组合,用于高分辨率的微焦计算机断层扫描 (microCT) 扫描.
- 确定了三种类型的肌肉束:纵向,半径和横向,基于它们的方向和假定的功能.
主要成果:
- 非洲龙的干尖呈现出三分之一的纵向和三分之二的辐射/横向肌肉的组成.
- 大象最大的干尖显示一个反向的比例,三分之二的纵向和三分之一的辐射/横向肌肉囊.
- 这些独特的肌肉分布被假设为支持观察到的特定物种的抓取行为.
结论:
- 在非洲大草原大象和亚洲大象之间存在着巨大的肌肉囊组成差异.
- 大象的肌肉结构与它们的专业抓取功能有很强的相关性.
- 这项研究为大象的各种操纵能力提供了生物力学解释.
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