Use of sensory feedback for voluntary control

使用感觉反馈进行自愿控制

• 批准号: RGPIN-2018-06068
• 负责人: Scott, Stephen
• 金额: $ 16.9万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=746097
• 关键词: Use; sensory; feedback; voluntary; control

It is easy to be impressed when a hockey player speeds down the ice and scores a goal. Even if they arejostled by the defensemen, great athletes quickly adjust or even change where they shoot the puck to his or her advantage. Engineering control theory provides important insight on how our motor system can convert sensory information into rapid motor corrections to perform these impressive feats of skill. Inspired by control theory, the focus of this research program is to examine how visual and proprioceptive (muscle sensory signals) support our ability to make these rapid motor corrections. Our previous work demonstrated how online control using proprioceptive feedback can be adjusted to consider factors such as target shape or the presence of obstacles in the environment. Our first project explores whether and how quickly visual feedback also considers these task-related factors. Our preliminary data on human subjects highlights it can but requires at least 130ms, 60ms longer than for proprioceptive feedback. Our second project explores the impact of this delay in processing visual as compared to proprioceptive feedback. As sensory signals can have noise and also have delays in transmitting information to the brain, a key problem is to understand how the motor system combines sensory signals for online control. Should you use the more accurate (vision) or the fastest (proprioceptive)? Here we examine this multi-sensory integration problem by manipulating visual and proprioceptive feedback during reaching. Our preliminary data highlight that proprioceptive feedback initially dominates over visual feedback during movement, matching mathematical models that consider variability and delays. Finally, our third project will explore how dynamic goals (targets moving in the environment) influence our rapid motor corrections. The present research program will provide important fundamental properties about our voluntary motor system and it supports our ability to move and interact in the world. The research projects will provide important training opportunities for several trainees, including the use of advanced technologies to study motor function. The proposal will also impact our future studies exploring how neurological injuries, such as stroke, impact one's ability to use proprioceptive and visual information to guide motor actions.

当一个曲棍球运动员在冰上加速并进球时，很容易给人留下深刻的印象。即使他们被防守队员推挤，伟大的运动员也会迅速调整甚至改变他们的投球位置。工程控制理论为我们的运动系统如何将感觉信息转化为快速的运动纠正，以完成这些令人印象深刻的技能壮举提供了重要的见解。受控制理论的启发，这项研究计划的重点是研究视觉和本体感受（肌肉感觉信号）如何支持我们进行这些快速运动纠正的能力。我们以前的工作证明了如何使用本体感受反馈的在线控制可以调整，以考虑目标形状或环境中障碍物的存在等因素。我们的第一个项目探讨了视觉反馈是否以及如何快速地考虑这些与任务相关的因素。 我们对人类受试者的初步数据显示，它可以，但需要至少130毫秒，比本体感受反馈长60毫秒。我们的第二个项目探讨了与本体感受反馈相比，这种延迟对视觉处理的影响。由于感觉信号可能有噪音，并且在将信息传输到大脑时也有延迟，因此关键问题是了解运动系统如何结合感觉信号进行在线控制。 你应该使用更准确的（视觉）还是更快的（本体感受）？ 在这里，我们研究这个多感官整合的问题，通过操纵视觉和本体感受反馈达到。我们的初步数据强调，本体感觉反馈最初在运动过程中主导视觉反馈，匹配考虑可变性和延迟的数学模型。最后，我们的第三个项目将探讨动态目标（在环境中移动的目标）如何影响我们的快速运动校正。目前的研究计划将提供有关我们的自主运动系统的重要基本特性，并支持我们在世界上移动和互动的能力。这些研究项目将为几名学员提供重要的培训机会，包括使用先进技术研究运动功能。该提案也将影响我们未来的研究，探索神经损伤，如中风，如何影响一个人使用本体感受和视觉信息来指导运动动作的能力。