LOCOMOTOR ONTOGENY OF PRIMATE QUADRAPEDALISM AND THE EVOLUTION OF PRIMATE GAIT

该子项目是利用NIH/NCRR资助的中心赠款提供的资源的许多研究子项目之一。子项目和研究者（PI）可能从另一个NIH来源获得了主要资金，因此可以在其他CRISP条目中表示。所列机构为中心，不一定是研究者所在机构。体重和形状的变化可能会影响狒狒生命的前6个月期间四条腿行走行为变化的生物力学。婴儿从一个横向序列在身体步态和运动方面，将（手臂在同侧腿之后触地）步态转换为（手臂在对侧腿之后触地）步态。这是一个重要的转变，因为成年灵长类动物的对角序列步态在哺乳动物中是独一无二的，并且对于它为什么进化没有共识。这个项目将解决这个问题。将在4至26周龄的幼狒狒中评估行走的生物力学。将在肢体上放置反射标记，并使用3D运动分析系统和摄像机记录运动。将在身体节段上放置小重量，以测试步态随体重分布变化的变化。我们支持基金会的初步工作，以证明可行性并收集试点日期。从利基基金会获得资金，并在奥斯汀建立了一个实验室，以继续这项工作。我们把婴儿/幼年狒狒租给研究项目。这个项目正在进行中。这项研究的结论将有助于阐明灵长类动物行走运动的进化，并有助于确定可能导致灵长类动物对角序列步态进化的身体结构变化。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Changes in body weight and shape may influence the biomechanics of change in four leg walking behavior during the first 6 months of baboon life. Infants change from a ¿lateral sequence¿ (arm touches down after ipsilateral leg) gait to a ¿diagonal sequence¿ (arm touches down after contralateral leg) gait, in terms of body gait and motion. This is an important transition because the diagonal sequence gait in adult primates is unique among mammals, and there is no consensus on why it evolved. This project will address that question. Biomechanics of walking will be assessed in infant baboons between 4 and 26 weeks old age. Reflective markers will be placed on limbs and motion will be recorded with a 3D motion analysis system in conjunction with a video camera. Small weights will be placed on body segments to test for changes in gait with changes in body weight distribution. We supported initial work at the Foundation to demonstrate feasibility and gather pilot date. Funding was obtained from the Leakey Foundation and a laboratory was established in Austin to continue the work. We lease infant/juvenile baboons to the research program. This project is underway. The conclusion of this study will shed light on the evolution of walking motion in primates and will help identify the changes in body structure that might have led to the evolution of diagonal sequence gait in primates.