动态视觉运动通过先验重力知识的调制对姿势垂直感知的影响。,Neuroscience Letters

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动态视觉运动通过先验重力知识的调制对姿势垂直感知的影响。
Neuroscience Letters ( IF 2.5 ) Pub Date : 2019-12-12 , DOI: 10.1016/j.neulet.2019.134687
Keisuke Tani ₁ , Sho Ishimaru ₂ , Shinji Yamamoto ₃ , Yasushi Kodaka ₄ , Keisuke Kushiro ₅

Affiliation

为了内部估计重力方向和身体方向，中枢神经系统考虑了周围的一些感觉输入和重力的先验知识。假设视觉输入的调制提供重力的间接信息，会影响前庭和体感系统的其他传感输入在内部建立的先验知识，从而导致相对于重力的感知人体定向发生改变。为了检验该假设，我们研究了在全身静态倾斜过程中呈现视觉运动刺激对感知姿势垂直度的后续评估的影响。15名受试者观看了一个目标，该目标沿着身体的纵轴从头到脚以恒定的向下加速度（CA条件）或恒定速度（CV条件）移动，或者他们在全身静态倾斜过程中没有受到任何视觉刺激（NV条件）。随后，主观姿势垂直（SPV）的方向进行了评估。结果表明，在CA条件下的SPV与NV条件下的SPV相比向前倾斜的方向显着倾斜，而在CV和NV条件下的SPV没有显着差异。目前的结果表明，沿着身体纵轴的动态视觉运动具有向下的加速度，可以调节重力的先验知识，进而影响对身体垂直度的感知。结果表明，在CA条件下的SPV与NV条件下的SPV相比向前倾斜的方向显着倾斜，而在CV和NV条件下的SPV没有显着差异。目前的结果表明，沿着身体纵轴的动态视觉运动具有向下的加速度，可以调节重力的先验知识，进而影响对身体垂直度的感知。结果表明，在CA条件下的SPV与NV条件下的SPV相比向前倾斜的方向显着倾斜，而在CV和NV条件下的SPV没有显着差异。目前的结果表明，沿着身体纵轴的动态视觉运动具有向下的加速度，可以调节重力的先验知识，进而影响对身体垂直度的感知。

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Effect of dynamic visual motion on perception of postural vertical through the modulation of prior knowledge of gravity.

To internally estimate gravitational direction and body orientation, the central nervous system considers several sensory inputs from the periphery and prior knowledge of gravity. It is hypothesized that the modulation of visual inputs, supplying indirect information of gravity, affects the prior knowledge established internally by other sensory inputs from vestibular and somatosensory systems, leading to the alteration of perceived body orientation relative to gravity. In order to test the hypothesis, we examined the effect of presenting a visual motion stimulus during a whole-body static tilt on the subsequent evaluation of the perceived postural vertical. Fifteen subjects watched a target moving along the body longitudinal axis directing from head to feet with constant downward acceleration (CA condition) or constant velocity (CV condition), or they did not receive any visual stimulation (NV condition) during the whole-body static tilt. Subsequently, the direction of the subjective postural vertical (SPV) was evaluated. The result showed that the SPV in the CA condition was significantly tilted toward the direction of the preceding tilt compared to that in the NV condition while those in the CV and NV conditions were not significantly different. The present result suggests that dynamic visual motion along body longitudinal axis with downward acceleration can modulate prior knowledge of gravity, and in turn this affects the perception of body verticality.

更新日期：2019-12-12

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