大鼠被盖背核的传入性联系——HRP轴突逆行及顺行传递法研究

本研究应用HRP轴突逆行性传递技术,微量注射结合微电泳法,经三种不同入路将酶输入于大鼠的被盖背核,以观察其传入性联系。切片的组织化学处理采用了二氨基苯胺法、联苯胺法、氯化钴二氨基苯胺法和四甲基联苯胺法显色。将HRP输入被盖背核后,在两种输入法和三种入路法切片中均能观察到标记神经元核团的计有:下丘脑外侧核、缰外侧核、束旁核、下丘脑后核、乳头体外侧核、达克谢维奇核、脚间核、中脑导水管周围灰质腹外侧区、中缝背核、舌下神经前置核和孤束核。另外,将HRP分别输入到束旁核和舌下神经前置核后,用HRP轴突顺行传递技术,均可在被盖背核观察到标记终末。从另一角度证实了束旁核—被盖背核和舌下神经前置核—被盖背核间的纤维联系。

THE AFFERENT CONNECTIONS OF THE NUCLEUS TEGMENTI DORSALIS IN THE ALBINO RAT

Afferent connections to the nucleus tegmenti dorsalis were studied by means of retrograde axonal transport method of horseradish peroxidase (HRP). HRP was depositted stereotaxically via three approaches: vertical, oblique through the cerebellum or oblique through the cerebrum. The serial sections were treated by 3,3'-diamino-benzidine, benzidine dihydrochloride, diaminobenzidine-cobalt dichloride or tetrame-thylbenzidine respectively.Labeled neurons were observed in following nuclei: nucleus lateralis habenulae,nucleus interpeduncularis, nucleus mammillaris lateralis, nucleus posterior hypothalami, nucleus lateralis hypothalami, substantia grisea centralis mesencephali, nucleus dorsalis raphes, nucleus tractus solitarii, nucleus prepositus hypoglossi, nucleus parafascicularis and nucleus of Darkschewitsch.Then HRP was introduced into nucleus parafascicularis or nucleus prepositus hypoglossi, labeled terminals were also observed within the nucleus tegmenti dorselis.