摘要
将霍乱毒素-辣根过氧化物酶(CT-HRP)注入7只家兔的下斜肌,观察标记细胞在动眼神经核内的分布及其树突构筑学。动眼神经核呈长椭圆形,长轴指向头尾方向。可分为头、中及尾三部,头部为单一核团,中间部分为背内及腹外两部,尾侧部可分为背腹两部。下斜肌运动神经元主要分布于同侧动眼神经核内,占全长的三分之二,沿头尾方向呈柱状排列。于头侧分布于核背内侧,向尾侧经内侧转至腹侧。动眼神经核头端及尾端内无标记细胞。在对侧核中有少数标记细胞。下斜肌运动神经元的树突分布远超过动眼神经核的范围;向背侧伸入中央灰质深部接近中脑水管处;向腹侧及外侧穿过内侧纵束进入网状结构,还有少数细胞的树突伸向对侧动眼神经核内,因此推测动眼神经核的感受野远超过其核区范围。
The localization of the neurons which control the inferior oblique muscle in the oculomotor nucleus and their dendritic architecture were studied by injecting the conjugated cholera toxin-horseradish peroxidase(CT-HRP)into the inferior oblique muscle of 7 rabbits.The oculomotor nucleus could be divided into oral,middle and caudal parts.The middle part was further divided into dorsomedial and ventrolateral parts,and the caudal part divided into dorsal and ventral parts.The labeled neurons innervating the inferior oblique muscle were mainly distributed ipsilaterally and occupying two thirds.of the rostrocaudal extent of the oculomotor nucleus,a few were scattered contralaterally.The labeled cells were found in the dorsomedial part of the nucleus orally,and shifted in successive caudal sections to the medial and then to the ventral part.No labeled cells in the oral and caudal ends of the nucleus could be identified.The dendritic branches of the labeled neurons covered the whole nucleus,but densest in its dorsomedial part.Many of them extended beyond the boundary of the nucleus into the central gray matter dorsally,some even approacheding the aqueduct,or through the medial longitudinal fasciculus into the reticular formation laterally and ventrally.A few dendrites crossed the midline into the contralateral nucleus.Therefore the receptive field of the oculomotor nucleus is presumably much larger than the area of the nucleus itself.
作者
舒斯云
鞠躬
Shu Siyun;Ju Gong(The Fourth Military Medical College)
出处
《解剖学报》
CAS
1985年第3期270-274,340-341,共7页
Acta Anatomica Sinica
关键词
下斜肌
动眼神经核
树突构筑
CT-HRP法
家兔
Inferior oblique muscle
Oculomotor nucleus
Dendritic architecture
CT-HRP method
Rabbit
