关键词: 泰和乌鸡, 脑桥, 神经核团, 形态特征

Abstract: In order to investigate the cytoarchitecture of the nuclei in central nervous system of silky fowl, the pons of ten silky fowl brainstems were studied by paraffin continual sections and haematoxylin-eosine (HE) staining. The morphologic characteristics of cochlear nuclei, abducens nuclei, abducens accessorius nucleus, facial nucleus, sensory principal nucleus of trigeminal nerve, motor nucleus of trigeminal nerve, locus ceruleus and nucleus subceruleus, and rapheal nucleus of pons were observed under the light microscope. The results of the present study showed that the cochlear nuclei were also divided into cochlear magnocellular nucleus, laminar nucleus and angular nucleus, but the neurons in this nuclear group were largely mediumsized. The cochlear magnocellular nuclei were relatively developed. The circumscription of the angular nucleus were not clear. The anterior poles of the abducens nuclei and the facial nucleus were mostly parallel. The abducens accessorius nucleus were remarkably close to the abducens nuclei. Facial intermedia nuclei were not developed fully. The motor nucleus of trigeminal nerve were not divided into three subnuclei. The neurons in locus ceruleus are relatively denseness. Most neurons of the locus ceruleus are mediumsized, round, oval. The nucleus subceruleus locates at the inferior, its verge was not obvious, the cells of which distribute sparsely, the neurons are mainly ellipse and spindle, and mostly are mediumsized. The nucleus raphes of pons situates at the lower part of the raphes area in the posterior segment of pons. The neurons are mainly triangle, starlike and ellipse, and mostly are giant neurons.The processes of the neurons are well developed.The distribution of all the nuclei were similar to Pekin duck and fowl.

Key words: Taihe silky fowl, pons, nuclear groups, morphologic characteristics