摘要
目的 :探讨豚鼠副嗅球 (AOB)是否存在多个功能分区。方法 :在豚鼠副嗅球矢状位切片上 ,将双钨电极插入副嗅球前部或后部的犁鼻神经纤维层 (VNL ) ,以单个方波刺激传入神经纤维 ,用玻璃微电极记录 AOB前部或后部外橄状层 (EPL)细胞外场电位。结果 :电刺激 VNL,可在 EPL 记录到典型的衰减性场电位 ,且后 EPL记录到的场电位的持续时间较前部分明显延长。刺激前 VNL 仅在前 EPL 记录到场电位 ,而刺激后 VNL 只在后EPL 记录到场电位。结论 :豚鼠副嗅球可分为前后两个亚区 ,两区存在解剖学上的差异 ,说明在犁鼻系统中至少存在两个不同的传入 -传出通路。
Objective:To elucidate possible functional subdivisions in the guinea pig accessory olfactory bulb.Method:The guinea pig accessory olfactory bulbs were cut in sagittal slice.Bipolar tungsten electrodes were inserted into anterior or posterior vomeronasal nerve layers and single square pulses were delivered through the eletrodes to activate afferent fibres.Glass microelectrodes were used to record extracellular field potentials of anterior or posterior external plexiform layers.Result:A single shook of the VNL provoked a characteristic damped oscillatory field potential and the oscillation in the pAOB was more distinct in wave form and longer in duration than those in the aAOB.The stimulation of anterior VNL elicited field potentials exelusively in the anterior region of EPL,whereas shocks to the posterior VNL provoked oscillatory responses only within the posterior EPL.Conclusion:The accessory olfactory bulb in the guinea pig is distinctly segregated into the anterior and posterior subdivisions and an anatomical boundary exists in both regions.The results suggested that there are at least two different input output pathways in vomeronasal systems.
出处
《临床耳鼻咽喉科杂志》
CAS
CSCD
北大核心
2001年第5期221-223,共3页
Journal of Clinical Otorhinolaryngology
关键词
副嗅球
电生理
功能分区
Accessory olfactory bulb
Electrophysiology
Functional subdivisions
