下丘传入纤维的中脑起源

AFFERENT FIBROUS ORIGINS OF INFERIOR COLLICULUS FROM THE MIDBRAIN IN RAT

应用荧光逆行追踪技术，探索下丘核在中脑的传入纤维起源，将高度敏感的新型荧光示踪剂——荧光金（ＦＧ）注入１５只成年健康大鼠的一侧下丘（ＩＣ），在中脑的下列核团可见到逆行荧光标记细胞：同侧黑质（ＳＮ），外侧丘系中间核（ＩＮＬＬ）和外侧丘系腹侧核（ＶＮＬＬ）；对侧滑车神经核和下丘中央核（ＩＣＣ）；双侧中脑深核（ｄｐＭ）、中央灰质（ＣＧ）、下丘外核（ＩＣＸ）、下丘背核（ＩＣＤ）、上丘（ＳＣ）、外侧丘系背侧核（ＤＮＬＬ）和Ｓａｇｌｕｍ核。

Fluorogold(FG)was injected into the left inferior colliculus in fifteen adult ratsto study the afferent fibrous origins of the inferior colliculus from the midbrain,FGlabelled-retrogradely neurons were found in the following nuclei of the ipsilateral side:substantia nigra(SN),ventral nucleus of the lateral lemniscus(VNLL),intermidial nucleus ofthe lateral iemniscus(INLL);in the following nuclei of the contralateral side:trochlearnucleus, central nucleus of the inferior colliculus(ICC);and in the following nuclei of bothsides:deep mesencephalic nucleus(dpM),central gray(CG),the external nuleus of the infe-rior colliculus(ICX),the dorsal nucleus ofthe inferior colliculus(ICD),the dorsal nucleus ofthe lateral lemniscus,Saglums.