Is horizontal semicircular canal ocular reflex influenced by otolith organs input?

Abstract

Eye movements in the supine position and the prone position were not in a symmetric fashion. Nystagmus in the left-ear-down position and the right-ear-down position were not symmetric either. These phenomena indicate that the axis of the eyeball rotation was affected by the shift of the direction of gravity exerted on the head.

Light cupula of the horizontal semicircular canal occurring alternately on both sides: a case report

“…At both episodes of vertigo, the intensity of nystagmus during head-roll test was greater when the head was turned to the healthy side than the lesioned side, which ran counter to Ewald’s second law. Although further investigation is needed to explain this, possible mechanisms can be speculated as follows; (1) incomplete head rotation to the lesioned side in supine head-roll test, (2) anatomical variations of hSCC within the temporal bone such as excessive upward-tilting of anterior end of the hSCC, (3) the influence of otolith organ inputs upon hSCC ocular reflex by way of the velocity storage integrator [ 9 ], and (4) anatomical variation of the cupula within hSCC in a way that the axis of cupula is running lateral to medial in direction.…”