MULTIPLE-UNIT ACTIVITY EVOKED IN DORSAL CAP OF INFERIOR OLIVE OF THE RABBIT BY VISUAL-STIMULATION
MULTIPLE-UNIT ACTIVITY EVOKED IN DORSAL CAP OF INFERIOR OLIVE OF THE RABBIT BY VISUAL-STIMULATION
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DOI：
10.1152/jn.1980.43.1.151
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发表时间：
1980-01-01
影响因子：
2.5
通讯作者：
HESS, DT
中科院分区：
文献类型：
--
作者：
BARMACK, NH;HESS, DT
在前庭和视动刺激过程中，对麻醉和未麻醉兔子的下橄榄背帽进行多单元活动的微电极记录。当兔子用戊巴比妥钠或氯醛糖-尿烷麻醉时，通过对侧眼睛的光刺激可以在背帽中引起大的场电位。在用氟烷麻醉的兔子或未麻醉的兔子中不能引起这种场电位。背帽神经元被对侧眼睛呈现的大的、对比度丰富的刺激最大程度地兴奋，以 1-2°/s 的速度沿前后方向移动。背帽神经元的放电率因沿相反方向移动的刺激而降低。当排除视觉输入时，背帽神经元的活动不受前庭刺激的调节。背帽神经元对视网膜滑动速度和视动刺激的高导数敏感。仅当眼球运动影响视网膜上的视动图像的运动时，它们的活动才与眼球运动相关。
Microelectrode recordings of multiple-unit activity were made from the dorsal cap of the inferior olive of anesthetized and unanesthetized rabbits during vestibular and optokinetic stimulation. A large field potential could be evoked in the dorsal cap by photic stimulation of the contralateral eye when the rabbit was anesthetized with sodium pentobarbital or chloralose-urethane. This field potential could not be evoked in rabbits that were anesthetized with halothane or in unanesthetized rabbits. Dorsal cap neurons were maximally excited by large, contrast-rich stimuli presented to the contralateral eye, moving in the posterior-anterior direction at a velocity of 1-2.degree./s. The discharge rate of dorsal cap neurons was decreased by stimuli moving in the opposite direction. The activity of dorsal cap neurons was not modulated by vestibular stimulation when visual inputs were excluded. Dorsal cap neurons were sensitive to retinal slip velocity and higher derivatives of optokinetic stimulation. Their activity was related to eye movements only when the eye movements affected movement of optokinetic images on the retina.