Increase in weighting of vision vs. proprioception associated with force field adaptation
Increase in weighting of vision vs. proprioception associated with force field adaptation
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DOI：
10.1038/s41598-019-46625-7
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发表时间：
2019-02
影响因子：
4.6
通讯作者：
Brandon M. Sexton;Yang Liu;Hannah J. Block
中科院分区：
文献类型：
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作者：
Brandon M. Sexton;Yang Liu;Hannah J. Block
手的位置可以通过视觉和本体感觉（位置感）来估计。大脑被认为是加权和整合这些感知，形成一个多感官的估计手的位置与指导运动。力场适应是一种小脑依赖的运动学习，与运动和本体感受的变化有关。小脑与多感觉顶叶区域有联系;然而，力适应是否与多感觉知觉的变化有关尚不清楚。如果力适应对所有相关感觉模式的影响相似，则应保持大脑对视觉与本体感觉的权重。或者，如果力扰动被解释为体感不可靠，视觉可能会相对于本体感觉被加重。我们评估了视觉本体感受加权知觉估计任务之前和之后的主题进行了直行达到抓住一个机器人manipulhuiu。每个受试者进行一个会议与顺时针或逆时针速度依赖的力场，和一个会议在一个空字段。无论力场方向如何，受试者在直线向前的维度上，在力场会话中相对于零会话增加了他们的视觉重量与本体感觉重量（F1，44= 5.13，p = 0.029）。这表明，力场适应与大脑对视觉与本体感受的权重增加有关。
Hand position can be estimated by vision and proprioception (position sense). The brain is thought to weight and integrate these percepts to form a multisensory estimate of hand position with which to guide movement. Force field adaptation, a type of cerebellum-dependent motor learning, is associated with both motor and proprioceptive changes. The cerebellum has connections with multisensory parietal regions; however, it is unknown if force adaptation is associated with changes in multisensory perception. If force adaptation affects all relevant sensory modalities similarly, the brain’s weighting of vision vs. proprioception should be maintained. Alternatively, if force perturbation is interpreted as somatosensory unreliability, vision may be up-weighted relative to proprioception. We assessed visuo-proprioceptive weighting with a perceptual estimation task before and after subjects performed straight-ahead reaches grasping a robotic manipulandum. Each subject performed one session with a clockwise or counter-clockwise velocity-dependent force field, and one session in a null field. Subjects increased their weight of vision vs. proprioception in the force field session relative to the null session, regardless of force field direction, in the straight-ahead dimension (F1,44= 5.13, p = 0.029). This suggests that force field adaptation is associated with an increase in the brain’s weighting of vision vs. proprioception.