Allometry of masticatory loading parameters in mammals.
Allometry of masticatory loading parameters in mammals.
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哺乳动物咀嚼负荷参数的异速生长。
DOI：
10.1002/ar.21133
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Costley,DestinyB
中科院分区：
文献类型：
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作者：
Ravosa,MatthewJ;Ross,CallumF;Williams,SusanH;Costley,DestinyB
相当多的研究在哺乳动物运动系统的负载模式的缩放还没有伴随着一个类似的全面分析的哺乳动物咀嚼复合体的种间缩放的负载制度。为了解决这一不足，我们分析了下颌体骨应变在11个哺乳动物类群的身体大小不同的超过2.5个数量级，包括山羊，马，羊驼，猪，和7个灵长类动物类群。在警惕咀嚼和咬硬/坚韧食物期间，使用沿着臼齿或前臼齿下方下颌体侧面放置的玫瑰花形测量器收集骨应变数据。骨应变数据用于表征相关咀嚼载荷参数：峰值载荷大小、咀嚼周期持续时间、咀嚼频率、咬合占空因数、载荷速率和载荷时间。种间分析表明，正如在肢体元素中观察到的那样，不同体型的哺乳动物的体峰值应变幅度相似。咀嚼频率与身体大小呈负相关，就像与运动步频一样。咀嚼频率的异速生长变化似乎是由于与负荷时间呈负相关，而负荷时间随身体大小而增加。类似于运动装置，咬合占空因数，或咀嚼周期的持续时间，在此期间，语料库加载，不随身体大小而变化。峰值主应变幅值与加载速率的正相关性最强，其次是与加载的正相关性，这种复杂的关系最好通过加载速率和加载时间之间的相互作用项的多元回归方程来描述。除了为颅下颌骨生长、形态、功能和异速生长的解释提供信息外，这些比较还提供了一个关于不同体型成骨刺激模式的全骨骼视角。Anat Rec，293：557-571，2010.© 2010 Wiley利斯公司
Considerable research on the scaling of loading patterns in mammalian locomotor systems has not been accompanied by a similarly comprehensive analysis of the interspecific scaling of loading regimes in the mammalian masticatory complex. To address this deficiency, we analyzed mandibular corpus bone strain in 11 mammalian taxa varying in body size by over 2.5 orders of magnitude, including goats, horses, alpacas, pigs, and seven primate taxa. During alert chewing and biting of hard/tough foods, bone‐strain data were collected with rosette gauges placed along the lateral aspect of the mandibular corpus below the molars or premolars. Bone‐strain data were used to characterize relevant masticatory loading parameters: peak loading magnitudes, chewing cycle duration, chewing frequency, occlusal duty factor, loading rate, and loading time. Interspecific analyses indicate that much as observed in limb elements, corpus peak‐strain magnitudes are similar across mammals of disparate body sizes. Chewing frequency is inversely correlated with body size, much as with locomotor stride frequency. Some of this allometric variation in chewing frequency appears to be due to a negative correlation with loading time, which increases with body size. Similar to the locomotor apparatus, occlusal duty factor, or the duration of the chewing cycle during which the corpus is loaded, does not vary with body size. Peak principal‐strain magnitudes are most strongly positively correlated with loading rate and only secondarily with loading, with this complex relationship best described by a multiple regression equation with an interaction term between loading rate and loading time. In addition to informing interpretations of craniomandibular growth, form, function, and allometry, these comparisons provide a skeleton‐wide perspective on the patterning of osteogenic stimuli across body sizes. Anat Rec, 293:557–571, 2010. © 2010 Wiley‐Liss, Inc.