Collaborative Research: Coordination and Adaptability of Rapid Motor Synergies

9411503阿尔比布的快速动作似乎是“刻板印象”的，然而高速录像显示刻板印象中的行为有很大的变异性。快速运动通常由几种独立的肌肉协调模式组成，称为“运动协同”。例如，青蛙咬蠕虫的快速动作不到1/6秒，由“弓步协同效应”(向蠕虫跳跃)和“颌舌协同效应”(下巴张开，舌头伸向蠕虫，舌头缩回将蠕虫送入嘴里，下巴闭合)组成。这项研究旨在了解大脑如何协调多个协同效应，以及行为后期发生的协同效应如何使用反馈来补偿行为早期发生的协同效应的不准确。这项研究将通过高速录像对行为进行分析，并记录控制行为的肌肉以及控制肌肉的大脑和脊髓部分的信号。这些研究人员已经做的研究表明，这两种协同作用都是可变的，舌头投射可以弥补弓步中的不准确。这项研究收集的数据将用于对快速运动的适应性和协调性进行神经网络建模。这项研究的结果可以为大脑控制快速肢体运动和机器人控制提供新的见解。

9411503 Arbib Fast movements appear to be "stereotyped," yet high speed videotaping reveals significant variability in stereotyped behaviors. Fast movements are usually composed of several separate patterns of muscle coordination called "motor synergies." For example, the rapid movements of a frog snapping at a worm, which take less than 1/6th of a second, is composed of a "lunge synergy" (jumping towards the worm) together with the "jaw-tongue synergy" (the jaw opens, the tongue projects to hit the worm, the tongue retracts bringing the worm into the mouth and the jaw closes). This study is designed to understand how the brain coordinates multiple synergies, and how synergies that occur later in the behavior use feedback to compensate for inaccuracies of synergies that occur earlier in the behavior. The study will involve analysis of the behavior by high speed video taping, and recording of signals from the muscles controlling the behavior and the parts of the brain and spinal cord controlling the muscles. Studies already done by these investigators show that both synergies are variable, and that tongue projection can compensate for inaccuracy in the lunge. Data collected from the study will be used in neural network modeling of adaptability and coordination of rapid movements. The results of this study could provide new insights into the control of rapid limb movements by the brain and control of robots.