大鼠展神经核向对侧动眼神经核的内直肌亚核的纤维投射研究  

Study on afferent projections from the abducens nucleus to the contralateral medial rectus subnucleus of the oculomotor nucleus in the rat

作　　者：钟士江[1] 迟焕方[2] 牟君[1] 谢鹏[1] 

机构地区：[1]重庆医科大学临床学院神经内科,重庆400016 [2]青岛医学院神经解剖学教研室,青岛266021

出　　处：《重庆医科大学学报》2003年第5期571-572,584,共3页Journal of Chongqing Medical University

摘　　要：目的 :探讨展神经核对动眼神经核的内直肌亚核的纤维投射。方法 :辣根过氧化物酶逆行示踪法。结果 :展神经核的核间神经元由腹内侧亚群及腹外侧亚群构成 ,腹内侧亚群纵长 0 .6 0～ 0 .75mm ,标记细胞数 12 0± 5 0个 ;腹外侧亚群纵长 0 .3～ 0 .4mm ,标记细胞数 14 0± 4 0个。核间神经元的轴突纤维 ,越过中线 ,在对侧内侧纵束中上升 ,专一的终止于对侧的内直肌亚核。结论 :核间神经元在眼的水平同向运动中起关键作用。Objective: To investigate afferent projections from the abducens nucleus to the contralateral medial rectus subnucleus of the oculomotor nucleus in rats.Methods:The means of retrograde hoseradish peroxidase tracing was used.Results:The internuclear neurons in the abducens nucleus were divided into two subgroups,the ventromedial and the ventrolateral ones. The axons of the internuclear nurons crossed the midline,ascended in the contralateral medial longitudinal fasciculus and intermediated exclusively in the contralateral medial rectus subgroups.Conclusion:The results imply that the internuclear meurons could play a major role in conjugate horizontal eye movement.

关 键 词：展神经核 内直肌亚核 HRP 大鼠 

分 类 号：R322.8[医药卫生—人体解剖和组织胚胎学]