北京鸭脑干网状脊髓束的起源及其细胞构筑——HRP逆行追踪法研究

THE ORIGIN AND THE CYTOARCHITECTURE OF THE RETlCULOSPINAL TRACT IN WHITE BEIJING DUCKS——A STUDY USING HR P RETROGRADE TRANSPORT TECHNIQUE

采用HRP法,对54例北京鸭分别在脊髓的颈中部、颈膨大部、腰膨大部单侧注射或包埋HRP,兰色反应显色。逆行追踪了54例北京鸭,对脑干网状脊髓束的起源及其细胞构筑进行了研究。发现网状脊髓束不仅起于延髓和脑桥内侧网状结构的大细胞部,同时还起于外侧网状结构的小细胞部和中脑网状结构。标记细胞呈双侧性分布,同侧多于对侧。其结果为生理学研究提供了可靠的形态学依据。

The origin and the cytoarchitecture of the reticulospinal tract were investigated in 54 White BEIJING Backs By means of retrograde axonal tramsport of HRP.The HRP was injected or implanted into gray matter respective at the following three points of the spinal cord: C7, intumescentia cervicalis or intumoscentia lumbalis. The blue reaction method was used for staining.It was found that the reticulospinal neurons were located not only in the medial part of the laedullopontal tegmentum, bat also in its lateral part And there were a few scattered labelled neurons in the reticular formation of midbrain. The labelled -neurons were obser ed in bilateral reticular formation,The number of ipsilateral labelled neurons was larger than that of contralateral. The results of this disscrtation supplies deta for avian neuroanatomy and avian physiology.