Pettorossi Vito Enrico, Occhigrossi Chiara, Panichi Roberto, Botti Fabio Massimo, Ferraresi Aldo, Ricci Giampietro, Faralli Mario
Department of Medicine and Surgery, Section of Human Physiology, University of Perugia, 06132 Perugia, Italy.
Department of Medicine and Surgery, Section of Otorhinolaryngology, University of Perugia, 06132 Perugia, Italy.
Audiol Res. 2023 Mar 2;13(2):196-206. doi: 10.3390/audiolres13020019.
Asymmetrical sinusoidal whole-body rotation sequences with half-cycles at different velocities induce self-motion misperception. This is due to an adaptive process of the vestibular system that progressively reduces the perception of slow motion and increases that of fast motion. It was found that perceptual responses were conditioned by four previous cycles of asymmetric rotation in the dark, as the perception of self-motion during slow and fast rotations remained altered for several minutes. Surprisingly, this conditioned misperception remained even when asymmetric stimulation was performed in the light, a state in which vision completely cancels out the perceptual error. This suggests that vision is unable to cancel the misadaptation in the vestibular system but corrects it downstream in the central perceptual processing. Interestingly, the internal vestibular perceptual misperception can be cancelled by a sequence of asymmetric rotations with fast/slow half-cycles in a direction opposite to that of the conditioning asymmetric rotations.
具有不同速度半周期的不对称正弦全身旋转序列会引发自我运动错觉。这是由于前庭系统的一种适应性过程，该过程会逐渐减少对慢速运动的感知并增加对快速运动的感知。研究发现，感知反应受之前在黑暗中进行的四个不对称旋转周期的影响，因为在慢速和快速旋转过程中的自我运动感知在几分钟内仍会发生改变。令人惊讶的是，即使在光照条件下进行不对称刺激，这种条件性错觉仍然存在，而在光照状态下视觉会完全消除感知误差。这表明视觉无法消除前庭系统中的适应不良，但会在中枢感知处理的下游对其进行校正。有趣的是，通过与条件性不对称旋转方向相反的快速/慢速半周期的不对称旋转序列，可以消除内部前庭感知错觉。
