大白鼠前脑和脑干向双侧背海马的分支投射

本文用HRP法及荧光素逆行双标记法,研究了大白鼠前脑和脑干向双侧背海马的分支投射。将HRP溶液注入3只大白鼠的一侧背海马,分别在双侧内侧隔区中线部、Broca斜角带垂直支部、乳头上核、乳头丘脑束下核、中央上核及蓝斑内发现标记细胞,以同侧为主。将荧光素PI和Bb溶液分别注入3只大白鼠的左、右背海马内,在上述各核团内出现荧光素双标记细胞,双标记细胞约占单标记细胞的1/10～1/5,说明上述各核团的双标记细胞分支投射到双侧背海马。这种分支投射,对协调双侧海马活动起着重要作用。

DIVERGENT COLLATERALS FROM FOREBRAIN AND BRAINSTEM TO THE DORSAL HIPPOCAMPUS IN THE RAT

Divergent axon collaterals from forebrain and brainstem to the dorsal hippocampus in the rat were examined by means of HRP method and fluorescent retrograde double labeling method.HRP solution was injected into the left or right dorsal htppocampus of 3 rats. HRP labeled cells were observed in the bilateral medial parts of medial septal areas, vertical limbs of the diagonal band of Broca, supramammillary nuclei, submammillothalamic nuclei, superior central nucleus and locus ceruleus.PI and Bb solution were injected into the left and right hippocampus of 3 rats separately. Many retrograde double labeled cells were found in the nuclei mentioned above.The results indicate that the retrograde double labeled ceils in these nuclei may divergently projected to both the left and right dorsal hippocampi. They play an important role in harmonizing the activity of bilateral hippocampi.