Perception of haptic motion is enhanced during conditions of increased postural stability.
Perception of haptic motion is enhanced during conditions of increased postural stability.
复制标题
在姿势稳定性增加的情况下，触觉运动的感知会增强。
DOI：
10.1016/j.gaitpost.2019.12.023
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发表时间：
2020
期刊：
影响因子：
2.4
通讯作者：
Vérité F
中科院分区：
文献类型：
--
作者：
Vérité F
背景在个体轻轻接触运动表面时，观察到了姿势摇摆和指尖位移之间的耦合。这可以归因于中枢神经系统（CNS）误解为自我运动的表面运动，引起补偿摇摆respons.Research questionDoes基线姿势状态影响触觉对象运动的正确感知？方法在3种姿势条件下，即闭眼站立（EC）、睁眼站立（EO）和闭眼站立（EC），以及闭眼坐立时，测定食指在1 mm s-1速度下轻触时的运动觉检测阈值。对于站立条件下，闭上眼睛，位移阈值测量使用三个速度（1，2和4 mm s-1）。结果姿势条件有很大的影响运动知觉，与位移阈值从12 → 6 → 2 mm的减少从站立EC →站立EO →坐EC的过渡期间。随着速度的增加，观察到位移感知阈值的系统性降低。这往往表明，触摸物体的速度的增加可能有助于克服misinterpretation.SignificanceThese结果表明，从触觉运动中消除自我运动的能力增强在稳定的姿势，当刺激速度高。我们的研究结果可能有助于理解的机制之间的耦合表面运动和姿势摇摆，在文献中报道。
BackgroundCoupling between postural sway and fingertip displacement has been observed in individuals lightly touching a moving surface. This can be attributed to the central nervous system (CNS) misinterpreting surface motion as self-motion, evoking a compensatory sway response.Research questionDoes baseline postural state influence the correct perception of haptic object motion?MethodsMotion perception detection thresholds of index finger displacement at 1 mm s−1velocity during light touch were determined for three postural conditions: standing with eyes open (EO) and closed (EC), and sitting with eyes closed. For the standing condition with eyes shut, displacement thresholds were measured using three velocities (1, 2 and 4 mm s−1).ResultsPostural condition had a large influence on motion perception, with a reduction in displacement threshold from 12 → 6 → 2 mm during the transition from standing EC → standing EO → sitting EC. A systematic decrease in displacement perception threshold was observed with increasing velocity. This tends to suggest that the increase of the touched object velocity may help overcoming the misinterpretation.SignificanceThese results suggest that the ability to disambiguate self motion from haptic motion is enhanced during stable postures, and when stimulus velocity is high. Our findings may help to understand the mechanisms underlying the coupling between surface movements and postural sway, reported in the literature.
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