Postural and visual aftereffects to a slanted floor in lying and sitting positions
Postural and visual aftereffects to a slanted floor in lying and sitting positions
复制标题
DOI：
10.1016/j.visres.2022.108077
复制
发表时间：
2022-06-15
期刊：
影响因子：
1.8
通讯作者：
Yamazaki，Tadashi
中科院分区：
文献类型：
--
作者：
Higashiyama，Atsuki;Yamazaki，Tadashi
当我们闭上眼睛躺在倾斜的地板上一段时间后，我们可能会感觉到它比开始时更不倾斜。当我们躺在一个平坦的底座上观察一个倾斜的地板时，我们可能会感觉到它更水平。我们调查了这些姿势和视觉适应以及他们与躺在地板上和坐在地板上的参与者的相互作用。参与者适应了姿势，视觉或联合倾斜的地板，并被要求估计适应倾斜周围的测试倾斜度。估计被描述为一个线性函数的测试倾斜与高拟合优度的适应倾斜。这支持标准化，而不是饱和，视图。第二，函数的斜率，即，在姿势和视觉条件下，卧位对倾斜的敏感性较低，但在关节条件下较高，而在所有条件下，坐姿的敏感性同样较高。这是由增加视觉和非视觉线索的重力垂直在坐姿，并通过一个异常的模式，颅内流体静压在卧位。第三，在两种体位中，倾斜出现水平的角度，即，主观水平（SH），在姿势条件下比在视觉条件下大。最后，当姿势和视觉适应是联合的，SH在卧位之间的姿势和视觉单独SH，而SH在坐姿近似视觉单独SH。
After lying on a slanted floor for a while with the eyes closed, we may perceive it to be less slanted than at the beginning. After viewing a slanted floor while lying on a flat base, we may perceive it to be more horizontal. We investigated these postural and visual adaptations and their interactions with participants lying and sitting on the floor. The participants were adapted to a floor that was posturally, visually, or jointly slanted, and were asked to estimate the test slants around the adapting slant. The estimates were described as a linear function of the test slant with a high goodness-of-fit over the adapting slant. This supported normalization, not satiation, view. Second, the slope of the function, i.e., sensitivity to slant, in the lying position was low in the postural and visual conditions but high in the joint condition, whereas the sensitivity in the sitting position was equally high in all conditions. This was explained by an increase in visual and non-visual cues to the gravitational vertical in the sitting position, and by an abnormal pattern of intracorporeal hydrostatic pressure in the lying position. Third, in both body positions, the angle at which the slant appeared horizontal, i.e., the subjective horizontal (SH), was larger in the postural condition than in the visual condition. Finally, when the postural and visual adaptations were joint, the SH in the lying position was somewhere between the postural- and visual-alone SHs, whereas the SH in the sitting position approximated the visual-alone SH.