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首页> 外文期刊>Journal of Neurophysiology >Complementary spatial and timing control in rhythmic arm movements
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Complementary spatial and timing control in rhythmic arm movements

机译：节奏臂运动中的互补空间和时序控制

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Volitional rhythmic motor behaviors such as limb cycling and locomotion exhibit spatial and timing regularity. Such rhythmic movements are executed in the presence of exogenous visual and nonvisual cues, and previous studies have shown the pivotal role that vision plays in guiding spatial and temporal regulation. However, the influence of nonvisual information conveyed through auditory or touch sensory pathways, and its effect on control, remains poorly understood. To characterize the function of nonvisual feedback in rhythmic arm control, we designed a paddle juggling task in which volunteers bounced a ball off a rigid elastic surface to a target height in virtual reality by moving a physical handle with the right hand. Feedback was delivered at two key phases of movement: visual feedback at ball peaks only and simultaneous audio and haptic feedback at ball-paddle collisions. In contrast to previous work, we limited visual feedback to the minimum required for jugglers to assess spatial accuracy, and we independently perturbed the spatial dimensions and the timing of feedback. By separately perturbing this information, we evoked dissociable effects on spatial accuracy and timing, confirming that juggling, and potentially other rhythmic tasks, involves two complementary processes with distinct dynamics: spatial error correction and feedback timing synchronization. Moreover, we show evidence that audio and haptic feedback provide sufficient information for the brain to control the timing synchronization process by acting as a metronome-like cue that triggers hand movement.
机译：肢体循环和运动等加速节奏电机行为表现出空间和时序规律性。这种节奏运动在外源视觉和非疾病的存在下执行，之前的研究表明视觉在引导空间和时间调节方面发挥的枢轴作用。然而，通过听觉或触摸感觉途径传达的非智能信息的影响及其对控制的影响仍然不知识。为了表征有节奏臂控制中的非智能反馈的功能，我们设计了一种桨式杂耍任务，其中志愿者通过用右手移动物理手柄，将刚性弹性表面从虚拟现实中的刚性弹性表面撞击到目标高度。反馈在运动的两个关键阶段提供：球峰的视觉反馈并在球形桨碰撞下的同时音频和触觉反馈。与以前的工作相比，我们将视觉反馈限制为Jugglers评估空间准确性所需的最低要求，我们独立地扰乱了空间尺寸和反馈的时机。通过单独扰动这些信息，我们对空间准确性和时序诱发可解释的影响，确认玩杂耍和潜在的其他节奏任务，涉及两个具有不同动态的两个互补过程：空间纠错和反馈定时同步。此外，我们表明了音频和触觉反馈提供了大脑提供足够的信息来控制定时同步过程，以作为触发手动移动的节拍器。

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