VISUAL CONTROL OF LOCOMOTION

描述：（改编自申请人摘要） 该项目的长期目标是确定如何视觉 信息是用来控制人类运动在一个复杂的，不断变化的 环境：使用什么信息来感知属性，例如 一个人前进的方向，与静止和运动的碰撞 对象，以及如何将这些信息用于姿势和步态。的 拟议的研究将调查多种控制之间的相互作用 平衡、转向和避障的法则。在以前的工作中， 发现视觉系统准确地从光学系统恢复航向 在各种条件下流动。研究还发现， 适应性调节的光流在行走过程中，并密切 与步态相结合。该提案的目的是动态建模 平衡、转向和障碍物控制策略的相互作用 回避虚拟现实技术将被用于分离 在跑步机行走和操纵杆任务中的假设策略。五 建议项目：1.扩大工作重点与 视觉方向策略转向。2.焦点的相互作用 的扩张和均衡策略。3.一体化 目标寻求和避障的能力。4.对航向的感知， 主动转向5.整合姿势、步态和转向。的 结果将有助于对视觉控制的基本知识， 运动，并为视觉的临床研究提供基础， 运动缺陷、步态障碍和疾病中的移动性问题， 衰老

DESCRIPTION: (Adapted From The Applicant's Abstract) The long-term objective of the project is to determine how visual information is used to control human locomotion in a complex, changing Environment: What information is used to perceive properties such as one's direction of heading, collisions with stationary and moving objects, and how is this information used for posture and gait. The proposed research will investigate interactions between multiple control laws for balance, steering, and obstacle avoidance. In previous work it was found that the visual system accurately recovers heading form optic flow under a variety of conditions. It was also found that posture is adaptively regulated by optic flow during walking, and is closely integrated with gait. The aim of the proposal is to dynamically model interactions for control strategies for balance, steering, and obstacle avoidance. Virtual reality techniques will be used to dissociate hypothesized strategies in treadmill walking and in joystick tasks. Five projects are proposed: 1. Interaction of the focus of expansion and visual direction strategies for steering. 2. Interaction of the focus of expansion and equalization strategies for steering. 3. Integration of goal seeking and obstacle avoidance. 4. Perception of heading and active steering. 5. Integration of posture, gait, and steering. The results will contribute to basic knowledge about visual control of locomotion and provide a foundation for clinical research on visual- motor deficits, gait disorders, and mobility problems in disease and aging.