Taylor Andrea B, Holmes Megan A, Laird Myra F, Terhune Claire E
Department of Foundational Biomedical Sciences, Touro University California, Vallejo, California, USA.
Department of Family Medicine and Community Health, Duke University School of Medicine, Durham, North Carolina, USA.
Evol Anthropol. 2025 Mar;34(1):e22053. doi: 10.1002/evan.22053.
The jaw-adductor muscles drive the movements and forces associated with primate feeding behaviors such as biting and chewing as well as social signaling behaviors such as wide-mouth canine display. The past several decades have seen a rise in research aimed at the anatomy and physiology of primate chewing muscles to better understand the functional and evolutionary significance of the primate masticatory apparatus. This review summarizes variation in jaw-adductor fiber types and muscle architecture in primates, focusing on physiological, architectural, and behavioral performance variables such as specific tension, fatigue resistance, muscle and bite force, and muscle stretch and gape. Paranthropus and Australopithecus are used as one paleontological example to showcase the importance of these data for addressing paleobiological questions. The high degree of morphological variation related to sex, age, muscle, and species suggests future research should bracket ranges of performance variables rather than focus on single estimates of performance.
颌内收肌驱动与灵长类动物进食行为（如咬和咀嚼）以及社交信号行为（如张大嘴巴露出犬齿）相关的运动和力量。在过去几十年里，针对灵长类咀嚼肌的解剖学和生理学的研究不断增加，以便更好地理解灵长类咀嚼器官的功能和进化意义。这篇综述总结了灵长类动物颌内收肌纤维类型和肌肉结构的变化，重点关注生理、结构和行为表现变量，如比张力、抗疲劳能力、肌肉和咬合力，以及肌肉拉伸和张口度。傍人属和南方古猿属被用作一个古生物学例子，以展示这些数据对于解决古生物学问题的重要性。与性别、年龄、肌肉和物种相关的高度形态变异表明，未来的研究应该界定表现变量的范围，而不是专注于单一的表现估计值。
