Optokinetic stimulation can break Listing's law without induction of eye movement

Vertical OKS leads to a rotation of Listing's plane mainly around a vertical axis. This may represent false exhibition of central compensatory re-weighting with respect to inherent otoconial mass asymmetry resulting from the OKS-mediated loss of the gravity reference. In addition, a OKS-mediated thickening of Listing's plane suggests to us that confusing visual input can reduce the stability of the internal model, which would likely manifest itself as a thickening of Listing's plane. In other words, fluctuation between the build-up and drop-out of vection induced by optokinetic stimulation will cause a thickening of Listing's plane. The thickness of Listing's plane could be a novel clinical parameter for quantitatively evaluating static vestibular function and accuracy of the internal model.