The Neuromuscular Basis of Limbed Locomotion in Lizards

蜥蜴四肢运动的神经肌肉基础

• 批准号: 9514585
• 负责人: Bruce Jayne
• 金额: $ 22.77万
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-03-01 至 2000-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9514585&HistoricalAwards=false
• 关键词: Neuromuscular; Basis; Limbed; Locomotion; Lizards

9514585 Jayne There is currently no broad comparative understanding of the neuromuscular basis of locomotor movement of the hind limb of vertebrates because of a lack of information for amphibians and reptiles which generally have a "sprawling" limb posture unlike the "erect" limbed birds and mammals. Lizards are by far the most diverse lineage of vertebrates with the ancestral sprawling limb posture, and the proposed research will quantify the movements and in vivo patterns of muscle use in the hind limbs of this vertebrate lineage. Experiments with a generalized lizard species will test for differences associated with different speeds and locomotion up and down inclines. Three other lizard species with different specialized hind limb postures will be studied similarly allowing quantitative interspecific comparisons of motion and muscle activity. Upside-down locomotion will also be studied for two species of climbing specialists. Overall, the experiments will determine the extent of behavioral diversity in this system and address whether or not major innovations in motor pattern occur either for different locomotor tasks within a species or for similar locomotor tasks among species with differing morphology. It is hypothesized that intraspecific variability in motor pattern of a generalized species performing different tasks may encompass intraspecific variability in motor pattern among species with specialized limb posture. Understanding the functional basis of lizard locomotion will also complement their ecologically and evolutionarily-oriented studies which attempt to relate morphological variation to variation in locomotor performance and habitat selection. ***

9514585 Jayne目前对脊椎动物后肢运动的神经肌肉基础没有广泛的比较了解，因为缺乏关于两栖动物和爬行动物的信息，这些两栖动物和爬行动物的肢体姿势通常是“伸展”的，而不是“直立”的四肢鸟类和哺乳动物。到目前为止，蜥蜴是具有祖先伸展肢体姿势的最多样化的脊椎动物谱系，拟议的研究将量化这一脊椎动物谱系的后肢的运动和肌肉使用的活体模式。对一种普通蜥蜴物种的实验将测试与不同速度和上下坡度相关的差异。另外三种具有不同特殊后肢姿势的蜥蜴物种将被进行类似的研究，以便对运动和肌肉活动进行定量的种间比较。还将对两种攀岩专家的倒立运动进行研究。总体而言，实验将确定该系统中行为多样性的程度，并解决运动模式的重大创新是否发生在一个物种内的不同运动任务中，或者不同形态的物种之间类似的运动任务中。假设执行不同任务的一般物种的运动模式的种内变异性可能包括具有特殊肢体姿势的物种之间的运动模式的种内变异性。了解蜥蜴运动的功能基础也将补充它们面向生态和进化的研究，这些研究试图将形态变化与运动能力和栖息地选择的变化联系起来。***