Niklasson M, Tham R, Larsby B, Eriksson B
Department of Otolaryngology, Faculty of Health Sciences, Linköping, Sweden.
J Vestib Res. 1990;1(3):251-62.
Eye movements were recorded in the pigmented rat during vestibular, optokinetic and combined visual-vestibular stimulation. The dominant time constant in pigmented rats, tested during angular vestibular stimulation in darkness, is about two times longer than the cupular time constant. The gain and the duration of nystagmus, achieved by angular vestibular stimulation, can be enhanced by visual impulses. This is most evident during an optokinetic temporonasal stimulation, but is also seen with a nasotemporal stimulation. A mere optokinetic monocular stimulation without a synchronous vestibular excitation causes nystagmus only when the stimuli has a temporonasal direction. The duration of nystagmus, achieved by angular vestibular stimulation, is prolonged by disturbances of the neck proprioceptive system. This is more evident during a simultaneous visual input than in darkness. The ability to cancel nystagmus during conflicting vestibular and optokinetic impulses is well developed in the pigmented rat.
在有色大鼠中记录了其在前庭、视动和视觉-前庭联合刺激期间的眼球运动。在黑暗中进行角前庭刺激时测试的有色大鼠的主导时间常数，比壶腹时间常数长约两倍。通过角前庭刺激实现的眼球震颤的增益和持续时间可通过视觉冲动增强。这在视动性颞鼻刺激期间最为明显，但在鼻颞刺激时也可见。仅进行视动性单眼刺激而无同步前庭兴奋时，仅当刺激具有颞鼻方向时才会引起眼球震颤。通过角前庭刺激实现的眼球震颤持续时间会因颈部本体感觉系统的干扰而延长。这在同时有视觉输入时比在黑暗中更明显。有色大鼠在冲突的前庭和视动冲动期间消除眼球震颤的能力发育良好。
