Modulation in the use of multisensory information during voluntary action

自愿行动期间多感官信息使用的调节

• 批准号: RGPIN-2020-05831
• 负责人: Tremblay, Luc
• 金额: $ 2.04万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=718034
• 关键词: Modulation; use; multisensory; information; during

As you lift a water bottle and bring it over a glass, the receptors in your muscles and eyes are exposed to different excitation patterns. Lifting the bottle first requires adjusting the initial forces generated by your limb muscles, which is known as impulse regulation. After, bringing the spout over the glass requires additional adjustments, known as limb-target regulation. Although these sensorimotor processes have been discovered through studies of visual-motor functions, little is known about the contribution of muscle receptors (i.e., proprioception) to these processes. Thus, the current research program will unravel the contribution of vision and proprioception to the impulse and limb-target regulation processes. The first series of sensorimotor studies will present brief flashes of vision at different portions of a reaching movement, while employing different movement amplitudes and durations. Building upon theoretical debates about when vision is utilized during a voluntary movement, parsimonious frameworks of the different sensorimotor processes taking place during movements of different durations and amplitudes will be developed. The second series of sensorimotor studies will add visual perturbations during the brief flashes of vision. That will include moving a cloud of random dots forming a visual background and/ or a shift in target location. Because impulse regulation is thought to occur before limb-target regulation, it is expected that background perturbations will have significant effects on limb trajectories when presented early during the movement. In turn, target jumps are expected to have significant effects on limb trajectories when presented later during the movement. The third series of sensorimotor studies will incorporate a tendon vibration manipulation that is presented between trials and reduces the sensitivity of muscle receptors (i.e., proprioception). Using selected studies from the two series above, tendon vibration studies will test for the contribution of proprioception for impulse and limb-target regulation processes. As well, when combined with visual perturbations (i.e., background and/ or target), these studies will help determine if vision and proprioception are integrated for impulse and limb-target regulation. The last series will employ perceptual reports (e.g., “Did your limb final position undershot or overshot the target?”). The influence of vision and/or proprioceptive perturbations on the perceived limb endpoint are expected to corroborate the results from the sensorimotor studies. Overall, determining which sources of sensory information predominantly contribute to impulse vs. limb-target regulation will refine models of sensorimotor control. As well, these models will inform various practical designs (e.g., human-machine interfaces, rehabilitation programs and robots, sport training protocols).

当您举起水瓶并将其放在玻璃杯上时，肌肉和眼睛中的感受器会受到不同的兴奋模式的影响。举起瓶子首先需要调整肢体肌肉产生的初始力，这称为脉冲调节。 ，将喷嘴移到玻璃上需要额外的调整，称为肢体目标调节虽然这些感觉运动过程是通过视觉运动功能的研究发现的，但人们对肌肉受体（即本体感觉）对这些过程的贡献知之甚少。 。因此，当前的研究计划将揭示视觉和本体感觉对冲动和肢体目标调节过程的贡献。 第一系列的感觉运动研究将在伸手运动的不同部分呈现短暂的视觉闪烁，同时采用不同的运动幅度和持续时间。基于关于在随意运动期间何时使用视觉的理论争论，不同感觉运动过程的简约框架。不同持续时间和幅度的运动期间的位置将被开发。 第二系列的感觉运动研究将在短暂的视觉闪烁期间添加视觉扰动，这将包括移动形成视觉背景的随机点云和/或目标位置的移动，因为脉冲调节被认为发生在肢体目标之前。调节，预计背景扰动在运动早期出现时将对肢体轨迹产生显着影响，反过来，目标跳跃在运动后期出现时预计会对肢体轨迹产生显着影响。 第三系列感觉运动研究将纳入在试验之间进行的肌腱振动操作，并降低肌肉感受器的敏感性（即本体感觉），肌腱振动研究将使用上述两个系列中选定的研究来测试本体感觉的贡献。此外，当与视觉扰动（即背景和/或目标）相结合时，这些研究将有助于确定视觉和本体感觉是否整合用于冲动和肢体目标调节。 最后一个系列将采用感知报告（例如，“您的肢体最终位置是否低于或超过目标？”）预计视觉和/或本体感觉扰动对感知肢体端点的影响将证实感觉运动研究的结果。 总体而言，确定哪些感觉信息源主要有助于冲动与肢体目标调节，将完善感觉运动控制模型。此外，这些模型将为各种实际设计（例如人机界面、康复计划和机器人、运动训练）提供信息。协议）。