Modulation of Muscle Activation and Strain in Turtles

描述：(来自应用程序的逐字记录)这项研究将协调 声学显微测量、肌电图术和数字摄像检查肌肉 功能被调节以执行运动行为，与机械的对比 要求。为了实现这一目标，这项研究将扩展现有的 淡水龟肢体肌肉功能的肌电分析 后肢运动学与后肢肌肉长度变化(应变)的相关性，如 以及海龟在游泳和行走时的活动模式(EMG) 对水上运动有不同程度的专门化。 淡水海龟是检验这种调节的一个很好的模型系统。 肌肉功能，首先是因为所有物种都将肢体肌肉用于 运动类型(游泳和步行)具有非常不同的功能 要求，但也是因为一些物种使用一种形式的运动 偶尔允许在不同的行为之间检查调制 在使用频率上。具体的研究目标包括：(1)评估相关性 肌肉张力和活动的变化之间的关系，以及(2) 评估肌肉应变模式调整的趋势 使用不同频率的行为。通过利用自然资源 不同种类海龟的行为差异，这项研究将提供洞察力 转化为肌肉功能变化的一般模式，以允许 用于执行多个任务的相同的形态结构。

DESCRIPTION: (Verbatim from application) This research will coordinate sonomicrometry, electromyography, and digital videography to examine how muscle function is modulated to perform motor behaviors with contrasting mechanical requirements. To achieve this objective, this study will extend current electromyographic analyses of limb muscle function in freshwater turtles to correlate hindlimb kinematics with hindlimb muscle length changes (strain), as well as activity patterns (EMG), during swimming and walking in turtle species that possess different degrees of specialization for aquatic locomotion. Freshwater turtles are an excellent model system for examining the modulation of muscle function, first because all species use their limb muscles for two types of locomotion (swimming and walking) with very different functional requirements, but also because some species use one form of locomotion infrequently, allowing modulation to be examined between behaviors that differ in frequency of use. Specific research aims include (1) evaluating correlations between changes in muscle strain and activity across behaviors, and (2) evaluating trends in the modulation of muscular strain patterns across behaviors used with different frequencies. By taking advantage of natural variations in behavior among turtle species, this study will provide insight into general patterns in the changes in muscle function required to allow the same morphological structure to be used to perform multiple tasks.