Retention of visuo-proprioceptive recalibration in estimating hand position.
Retention of visuo-proprioceptive recalibration in estimating hand position.
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DOI：
10.1038/s41598-023-33290-0
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发表时间：
2023-04-13
影响因子：
4.6
通讯作者：
Block, Hannah J.
中科院分区：
文献类型：
--
作者：
Wali, Manasi;Lee-Miller, Trevor;Babu, Reshma;Block, Hannah J.
大脑使用视觉和本体感觉线索来估计手的位置，这两种线索结合起来给出了一个综合的多感官估计。线索之间的空间不匹配引起重新校准，这是一个补偿过程，其中每个单峰估计更接近另一个。目前尚不清楚在失配暴露后，视觉本体感觉的重新校准是如何保留的。在这里，我们询问直接视觉和/或手的主动运动是否可以撤销视觉本体感觉重新校准，以及重新校准是否在24小时后仍然明显。75名参与者进行了两组视觉、本体感觉和组合试验，没有反馈或直接看到手。在Block 1中，逐渐施加70 mm视觉-本体感觉错配，并重新校准评估。Block 2测试记忆力。在街区之间，1-4组休息或用直接可见或不可见的手进行几分钟的积极活动。第5组的阻滞时间间隔为24 h。所有五组都在第1块中重新校准了视觉和本体感觉，第1 - 4组在第2块中保留了大部分的重新校准。有趣的是，第5组表现出本体感觉再校准的离线增加，但保留很少的视觉再校准。我们的研究结果表明，视觉本体感觉的重新校准在短期内得到了强有力的保留。从长远来看，情境因素可能会影响留存率。
The brain estimates hand position using visual and proprioceptive cues, which are combined to give an integrated multisensory estimate. Spatial mismatches between cues elicit recalibration, a compensatory process where each unimodal estimate is shifted closer to the other. It is unclear how well visuo-proprioceptive recalibration is retained after mismatch exposure. Here we asked whether direct vision and/or active movement of the hand can undo visuo-proprioceptive recalibration, and whether recalibration is still evident 24 h later. 75 participants performed two blocks of visual, proprioceptive, and combination trials, with no feedback or direct vision of the hand. In Block 1, a 70 mm visuo-proprioceptive mismatch was gradually imposed, and recalibration assessed. Block 2 tested retention. Between blocks, Groups 1–4 rested or made active movements with their directly visible or unseen hand for several minutes. Group 5 had a 24-h gap between blocks. All five groups recalibrated both vision and proprioception in Block 1, and Groups 1–4 retained most of this recalibration in Block 2. Interestingly, Group 5 showed an offline increase in proprioceptive recalibration, but retained little visual recalibration. Our results suggested that visuo-proprioceptive recalibration is robustly retained in the short-term. In the longer term, contextual factors may affect retention.
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