Ichijo Hiroaki
Ichijo Ear, Nose and Throat Clinic, Ekimae, Hirosaki, Japan.
Acta Otolaryngol. 2012 Jul;132(7):715-9. doi: 10.3109/00016489.2012.656286. Epub 2012 Apr 12.
Otolith organs input influences the axis of horizontal semicircular canal ocular reflex; therefore, the plane of compensatory eye movements induced by the horizontal canal stimulation is not always parallel to the canal.
To clarify whether horizontal canal ocular reflex is influenced by otolith organs input.
The subjects were seven healthy humans. The right ear was stimulated using ice-water. Each subject was kept in a left-ear-down position for 20 s and then repositioned to a prone position, a right-ear-down position and a supine position with 20 s intervals. Nystagmus was analysed using three-dimensional video-oculography.
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.
耳石器官输入影响水平半规管眼反射轴；因此，水平半规管刺激诱发的代偿性眼动平面并不总是与半规管平行。
阐明水平半规管眼反射是否受耳石器官输入的影响。
受试者为7名健康人。用冰水刺激右耳。每位受试者左耳向下卧位保持20秒，然后重新定位到俯卧位、右耳向下卧位和仰卧位，间隔20秒。使用三维视频眼震图分析眼震。
仰卧位和俯卧位的眼动不对称。左耳向下卧位和右耳向下卧位的眼震也不对称。这些现象表明眼球旋转轴受头部重力方向改变的影响。
