大鼠下丘的非听性传出投射

NON-AUDITORIAL EFFERENT PROJECTIONS OF THE INFERIOR COLLICULUS IN THE RAT

为了全面了解大白鼠下丘的非听性传出投射及其起源细胞在下丘的分布情况,作者分别向下丘、丘脑和延髓注入WGA-HRP,作顺行或逆行追踪研究,结果如下:下丘的非听性传出投射分布较广,在间脑和脑干终止于12个核团和地区,包括同侧的桥核背外侧部、臂旁外侧核、中脑中央灰质、中脑外侧被盖核、上丘联合核、顶盖前区、丘脑网状核、膝上核、丘脑后核、丘脑腹核、未定带和对侧楔束核的背外侧部。上述非听性传出投射的起源细胞分布于下丘除中央核以外的其他亚核。

WGA-HRP was injected into the inferior colliculus,thalamus or the posterior region of the medulla oblongata respectively in the rat in order to study the non-auditorial efferent projection of the inferior colliculus and sites of the projectional neurons in the inferior colliculus.The results were as follows:Efferent neurons of the inferior colliculus project to many non-auditorial regions:homolateral dorsolateral division of the nucleus pontis,nucleus parabrachialis lateralis,substantia grisea centralis dorsalis,nucleus lateralis tegmenti,pretectal area,commissural nucleus of the superior colliculus,zona incerta,nucleus suprageniculatum,nuclei posterolateralis,reticularis and ventralis of the thalamus and the contralateral dorsolateral part of the cuneate nucleus.In the inferior colliculus,neurons of the non-auditorial efferent projection were located in all subnuclei of the inferior colliculus except the nucleus centralis.