INFORMATION PROCESSING MECHANISM OF RAPID AIMED MOVEMENT

这个项目的持续目标是研究人脑 产生目标肢体的机制和心理过程 动作 这些机制包括拟订初步方案的机制， 运动的弹道阶段和进行运动修正的阶段 基于视觉反馈。 我们将确定哪些因素会导致 目标运动的速度和准确性之间的权衡，以及这些 权衡受各种优化标准和视觉反馈的影响 条件 我们的结果将导致详细的数学和 运动生产的信息处理模型， 在实验室和现实世界中对电机控制性能的预测 situations. 这里采用的方法来实现这些目标，包括记录 持续时间，空间终点和运动学的快速运动， 目标区域的距离和宽度系统地变化。 从 获得的测量，速度精度权衡函数可以绘制， 揭示了这种速度和空间精度之间的关系， 动作 将进行三个系列的实验。 实验 系列1将确切地确定如何运动生产变化， 不太强调空间精度， 目标运动的时间精确度。 实验系列2将考察 不同类型的视觉反馈如何影响速度-准确性的形式 权衡 作为对这些研究的补充，实验系列3将探索 眼睛和肢体的运动是如何协调的 这将提供证据， 来自眼神经系统的信号影响肢体运动的方式 持续时间和终点。 拟议项目的结果将有助于发展 关于人体运动的基本知识和治疗严重的 运动障碍 由疾病或有害因素引起的运动功能障碍 药物作用可以根据机制更仔细地评估， 这里使用的实验方法。 例如，我们的研究特别是 与理解迟发性运动障碍有关， 由抗精神病药物引起的。

The continuing objective of this project is to investigate the human brain mechanisms and mental processes involved in producing aimed limb movements. Such mechanisms include those for programming the initial ballistic phases of movements and those for making movement corrections based on visual feedback. We will determine what factors contribute to tradeoffs between the speed and accuracy of aimed movements, and how these tradeoffs are affected by various optimization criteria and visual-feedback conditions. Our results will lead to detailed mathematical and information-processing models of movement production, allowing precise predictions about motor-control performance in laboratory and real-world situations. The methods employed here to achieve these objectives involve recording the durations, spatial endpoints, and kinematics of rapid movements toward target regions whose distances and widths vary systematically. From obtained measurements, speed-accuracy tradeoff functions can be plotted, revealing relations between the velocity and spatial precision of such movements. Three series of experiments will be conducted. Experiment Series 1 will determine exactly how movement production changes as more or less emphasis is placed on the spatial precision as proposed to the temporal precision of aimed movements. Experiment Series 2 will examine how different types of visual feedback affect the form of speed-accuracy tradeoffs. Complementing these studies, Experiment Series 3 will explore how eye and limb movements are coordinated. This will yield evidence about the way in which signals from the oculomotor system influence limb movement durations and endpoints. Results from the proposed project will contribute both to the development of basic knowledge about human movement and the treatment of serious movement disorders. Motor dysfunctions that arise from disease or harmful drug effects can be evaluated more carefully in terms of the mechanisms and experimental methods used here. For example, our research is especially relevant to understanding tardive dyskinesia, a disruption of movement production induced by antipsychotic drugs.