SELF GENERATED CORIOLIS FORCES DURING REACHING

许多神经系统疾病都与空间能力的丧失有关。这些障碍通常包括运动控制的缺陷（例如，到达目标或寄信）。了解这些运动控制任务是如何利用感觉信息是很重要的。因此，我们建议探索中枢神经系统如何补偿在改变的感觉运动适应下主动躯干旋转过程中自产生的科里奥利力，作为研究到达运动的自适应力控制和自校准的一种方式。此外，我们将研究非机械性支持触摸在稳定姿势和平衡中的应用，这通常是视力丧失或非功能性迷路患者视觉和前庭信息的主要替代。第一个实验将研究受试者所站立的平台的低系统位移如何影响随后的到达运动。在适应过程中，平台将系统地旋转（增量，以避免平衡和姿势的严重破坏），以减少惯性躯干旋转的量+，或使惯性旋转的量加倍。随后的到达运动（有或没有身体旋转）将用于评估通过改变惯性躯干旋转/平台关系对科里奥利力的补偿。另一项实验将探讨在（随后）同步转向和到达运动中，系统地移动提供给手的非支持性引导的作用。在适应过程中，观察者在左右转动躯干的同时，用手轻触非支撑平台。手平台将系统地旋转以减弱或放大手/身体的相对旋转量。随后的到达运动（有或没有身体旋转）将用于评估通过改变的惯性手位移/平台关系对科里奥利力的补偿。

Many neurological disorders involve the loss of spatial abilities. Such disorders will often involve deficits in motor control (e.g., reaching to a target, or posting a letter). It is important to understand how sensory information is utilized for these motor control tasks. W therefore propose to explore how the central nervous system compensates for self generate Coriolis forces during active trunk rotation under altered sensory-motor adaptation as a way to investigate adaptive force control and self- calibration of reaching movement. In addition, we will investigate the use of non-mechanistically supportive touch in stabilizing posture and balance, which is often a primary replacement for visual and vestibular information in patients with vision loss or a non-functional labyrinth. The first experiment will investigate how low systematic displacement of a platform, upon which the subject stands, affects subsequent reaching movements. During adaptation, the platform will systematically rotate (incrementally, to avoid gross disruption of balance and posture) to either reduce the amount of inertial torso rotation by +, or to double the mount of inertial rotation. Subsequent reaching motions (with and without body rotation) will be used to assess the compensation for Coriolis forces by the altered inertial torso rotation/platform relationship. Another experiment will investigate the role of systematic displacement of non- supportive guide provided to the hand during (subsequent) simultaneous turning and reaching movements. During adaptation, the non-supportive platform will be touched lightly by the hand of the observer while turning the trunk left and right. The hand platform will systematically rotate to either attenuate or amplify the amount of relative hand/body rotation. Subsequent reaching motions (with and without body rotation) will be used to assess the compensation for Coriolis forces by the altered inertial hand displacement/platform relationship.