Raphel C, Barraud P A
Centre de Recherches du Service Sante des Armees, Unité de Psychologie, La Tronche, France.
Aviat Space Environ Med. 1994 Mar;65(3):204-8.
The purpose of this study was to determine whether very low gravito-inertial forces produced by centrifugation affect the visually perceived eye level (VPEL) in the same way as the oculagravic illusion. Eleven subjects in total darkness were instructed to set a luminous target to the VPEL, either while they were motionless or undergoing very low centrifugation. Results showed a significant effect on VPEL at 0.01 m/s2 radial acceleration, which corresponds to a resultant gravito-inertial equal to 9.81001 m/s2. This radial acceleration value is lower than the lowest perception thresholds previously measured for a linear acceleration (about 0.05 m/s2). Thus, as previous results have shown that the oculogyral illusion indirectly decreases perceptual thresholds for the perception of angular acceleration in darkness, the lowering of the VPEL indirectly decreases thresholds for perception of radial acceleration produced by centrifugation. Moreover, there is a logarithmic relationship between very low centrifugation and the positioning of the VPEL at a lower level. This relationship is explained as a direct and sole effect on the sensory utricular otolithic membrane by the radial acceleration of centrifugation.
本研究的目的是确定离心产生的极低重力惯性力是否会以与眼重力错觉相同的方式影响视觉感知的眼水平（VPEL）。11名受试者在完全黑暗的环境中，被要求在静止或进行极低离心运动时，将一个发光目标设定到VPEL。结果显示，在径向加速度为0.01 m/s²时，对VPEL有显著影响，这相当于合成重力惯性等于9.81001 m/s²。该径向加速度值低于先前测量的线性加速度的最低感知阈值（约0.05 m/s²）。因此，正如先前的结果表明眼旋转错觉会间接降低黑暗中角加速度感知的阈值一样，VPEL的降低间接降低了离心产生的径向加速度的感知阈值。此外，极低离心与VPEL在较低水平的定位之间存在对数关系。这种关系被解释为离心的径向加速度对感觉性椭圆囊耳石膜的直接且唯一的影响。
