鸡脊髓小脑束起始神经元的节段性分布  

Segmental distribution of original neurons of spinocerebellar tracts in chicken

作　　者：张艳晓[1] 袁文菊[1] 刘为民[1] 王政富[1] 计慧琴[1] 王娟[1] 

机构地区：[1]佛山科学技术学院

出　　处：《解剖学杂志》2008年第5期694-698,共5页Chinese Journal of Anatomy

基　　金：国家自然科学基金(30571341)

摘　　要：目的:探索鸡脊髓小脑束起始细胞在脊髓的分布规律。方法:采用压力注射法将辣根过氧化物酶(HRP)引入鸡小脑Ⅴ、Ⅵ、Ⅶ、Ⅷ、Ⅸ诸叶,逆行追踪脊髓小脑束起始神经元的分布。结果:(1)鸡脊髓小脑束起始神经元分布于Clarke氏柱、腹角灰质、腹角内缘、腹角外缘、外侧索和腹侧索,并在禽类所特有的边缘柱发现起始神经元。(2)标记神经元在腰骶膨大部出现最多。(3)分别注射Ⅵ、Ⅶ叶在脊髓均有标记细胞出现,而注射Ⅴ叶、Ⅷ或Ⅸ叶在脊髓没有出现标记细胞。结论:鸡的脊髓小脑束主要起始于腰骶段脊髓,主要投射向小脑的Ⅵ、Ⅶ叶。Objective： To explore the distribution of original neurons of spinocerebellar tracts in chicken. Methods： Retrograde labeling with horseradish peroxidase （HRP） was used to observe the segmental distribution of original neurons of spinocerebellar tracts （SOTs） in chickens. 50% HRP solution was injected intoⅤ, Ⅵ, Ⅶ,Ⅷ and Ⅸ lobe of the cerebellum individually or together in Ⅵ, Ⅶ and Ⅷ lobes. After 2-4 days, the animals were sacrificed by heart-perfusion and the spinal cord was cut into sections and processed with HRP histochemistry. Results： （1） In anterior-caudal direction, the labelled neurons distributed mainly in lurnbosacral enlargement and fewer in cervical enlargement. （2） In lumbosacral enlargement （T7-S5 segments）, the original neurons were found mainly in Clarke column, and other original neurons were found in ventral horn, ventral margin of the ventral horn, lateral margin of ventral horn, lateral funiculus and ventral funiculus, especially in the marginal nucleus, the one exclusively appears in avain specials. （3） After injections in lobe Ⅴ,Ⅷ, Ⅸ individually, there were very few labelled neurons in the spinal cord. Conclusion： SCTs mainly origined from lumbosarcral enlargement and terminated mainly in the lobe Ⅵ and Ⅶ of the midlobe in the chicken cerebellum.

关 键 词：脊髓小脑束 起始神经元 节段性分布 鸡 

分 类 号：R322[医药卫生—人体解剖和组织胚胎学]