Morphology and physiology of the afferent and efferent otolith neurons.

本文报道了松鼠猴Scarpa‘s节初级前庭传入神经元的细胞色素氧化酶活性。神经元的大小与其细胞色素氧化酶活性呈负相关。用HRP法观察了豚鼠球囊初级前庭神经元的神经支配模式。不分叉的神经纤维与纹状体区域的I型毛细胞相连，而那些不分叉的神经纤维与椭圆形斑区的I型和II型毛细胞相连。变异系数越大的不规则放电神经元的倾斜增益越大。在外侧倾斜反应神经元中，同侧倾斜神经元的数量多于对侧。建立了一种用生物细胞素对龙猫前庭末梢器官前庭传入和传出神经元进行特异性标记的方法。在脑干背侧，支配…的前庭传出神经水平半规管多位于球囊的尾侧，主要位于对侧，而在网状结构，球囊传出较多，水平管传出较多，位于双侧。本文观察了热刺激对豚鼠耳石器初级前庭纤维的影响。随着放电频率的增加，神经元对热刺激的放电频率有增加的趋势，而那些大鼠增加到对侧倾斜的神经元对冷刺激的放电频率增加。因此，冷量测试不仅检查水平管功能，而且还检查耳石功能。记录受试者的失真产物耳声发射(DP-OAE)，观察对侧声刺激对其的影响。对侧声刺激对DP-OAE进行抑制。对侧声刺激对DP-OAE有抑制作用，前庭神经切除后这种抑制消失。较少

Cytochrome oxidase activity of primary vestibular afferent neurons in Scarpa's ganglion of the squirrel monkey was demonstrated. Negative correlation between the size of the neurons and their cytochrome oxidase activities was observed. Innervation patterns of primary vestibular neurons in the guinea pig utricule were examined with HRP method. Nerve fibers which do not bifurcate connect with type I hair cells in the striolar region, while those that do not bifurcate connect with type I and type II hair cells throughout the utricular maculae. Irregularly firing neurons with higher coefficient of variation had higher gain to tilt. Among the lateral tilt reactive neurons, ipsilateral tilt neurons were greater in number than contralateral neurons. A new method was developed for specific labeling of vestibular afferent and efferent neurons from selected vestibular end-organs of chinchillas using biocytin. In the dorsal region of the brainstem, the vestibular efferents that innervated the hor … More izontal semicircular canal were located more caudally than those innervating the saccule and were primarily on the contralateral side, while, in the reticular formation, saccular efferents were found more on the contralateral side and horizontal canal efferents were found bilaterally. The effect of caloric stimulation on the primary vestibular fibers originating from the otolith organ was investigated in the guinea pig. There was a tendency for neurons with increased firing rates increased firing rates to warm stimulation, while those whose rats increased to contralateral tilting had increased rates to cold stimulation. The caloric test thus examines not only the horizontal canal function but also the otolith function. Distortion product otoacoustic emission (DP-OAE) were recorded in human subjects, and the effect of contralateral sound stimulation on them was examined. DP-OAE was suppressed by contralateral sound stimulation on them was examined. DP-OAE was suppressed by contralateral sound stimulation, and this suppression disappeared after vestibular neurectomy. Less