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Updated: Feb 12, 2026

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走路的能源成本是否限制了更大的人类出生通道的进化?
Ekaterina Stansfield1, Clara Egner1,2, Philipp Mitteroecker1
1Department of Evolutionary Biology, University of Vienna, Vienna, Austria.
Proceedings. Biological sciences
|February 10, 2026
概括
人的骨盆宽度增加了绑架肌肉的能量需求,但由于运动期间的能量再分配,全身成本仍然很小. 下肢的长度显著影响代谢成本,超过骨盆宽度.
科学领域:
- 人类进化人类的进化.
- 生物力学 生物力学
- 古人类学古人类学.
背景情况:
- 人的骨盆在容纳大脑婴儿和高效的双脚运动之间提出了一个权衡,称为产科困境.
- 刚性的人类骨盆,适合走路,给分娩带来了挑战,增加了受阻劳动的风险.
- 静态力学预测更宽的骨盆会增加运动能量需求,但经验研究表明全身成本增加最小.
研究的目的:
- 调查关于骨盆宽度和运动成本的静态机械预测和经验发现之间的差异.
- 模拟人类步行动态,并评估骨盆宽度变化对能源消耗的影响.
- 为了将盆腔进化约束的预测与观察到的全身代谢成本相协调.
主要方法:
- 利用详细的肌肉骨模型来模拟人类的步态.
- 采用预测前建模来分析机动运动.
- 系统地改变了身体尺寸,包括骨盆宽度,超出了现代人类的变化.
主要成果:
- 更宽的骨盆显著增加了绑架肌肉的能量需求和激活,证实了静态机械预测.
- 在动态行走过程中,通过将能量再分配给其他肌肉来抵消吸收器成本的增加,从而导致全身代谢成本的最小增加.
- 与骨盆宽度相比,下肢长度对代谢成本 (2.5倍) 的影响要大得多.
结论:
- 静态机械预测较宽的骨盆增加的绑架肌肉成本是准确的.
- 全身代谢成本受到骨盆宽度的最小影响,这是由于有机体层面的补偿能量再分配.
- 骨盆进化上的机动性约束可能是在子系统水平 (例如,肌肉能量,疲劳) 而不是全身能量经济方面发挥作用.
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