双斑蟋触角传入神经纤维在脑内投射分布研究  

The Study on Projecting Distribution of Antennal Afferent Nerve Fibers in Cerebral Ganglion in Gryllus Bimaculatus

作　　者：武健文[1] 那杰[1] 于有良[1] 叶迪[1] 钟侣艳[1] 

机构地区：[1]沈阳师范大学化学与生命科学学院,辽宁沈阳110034

出　　处：《现代生物医学进展》2012年第29期5643-5646,5664,共5页Progress in Modern Biomedicine

基　　金：辽宁省教育厅基金项目(LS2010151);沈阳师范大学实验中心主任基金项目(SY200907)

摘　　要：目的:研究昆虫触角感受器传入神经末梢在脑内投射的空间布局,揭示触角感觉信息传入的神经结构。方法:使用氯化镍神经元示踪标记技术,对双斑蟋触角感受器传入神经纤维进行可视化标记,观察研究触角传入神经末梢在脑内的走行形态及分布规律。结果:双斑蟋触角感受器传入神经纤维进入中脑后大量的神经末梢终止在同侧的触角叶和触角机械感觉运动中枢,部分神经纤维向前走行,其神经末梢终止在前脑,还有部分神经纤维向后下行,经同侧神经索,其神经末梢终止在食道下神经节。结论:双斑蟋触角感受器传入神经纤维进入脑后主要投射到触角叶和触角机械感觉运动中枢,少部分投射到前脑和食道下神经节。这种多重投射模式可能在双斑蟋嗅觉信息传递整合、触角运动调节、味觉和摄食活动等方面发挥重要作用。ABSTRACT Objective： Investigate the projective distribution of antennal receptor afferent nerve fibers in cerebral ganglion in insects, and reveal the neural structure on passing sensory information fi-om the antennae through the brain. Methods： The nickel chloride neuronal tracing technique was used to mark afferent nerve fibers of antennal receptor in Gryllus Bimaculatus. The regularity on morphology and distribution of antennal afferent nerve terminals in the brain was observed. Results： Plenty of nerve endings of antennal receptor afferent nerve fibers, projecting into deutocerebnnn in Gryllus Bimaculatus, terminated in the ipsilateral antennal lobe and the ipsilateral antennal mechanosensory and motor center. A part of fibers projected into protocerebrum extending forward. Also, a part of fibers projected into the suboesophageal ganglion extending downward through the ipsilateral nerve cord. Conclusion： Most of antennal afferent nerve fibers projected into the antennal lobe and the antennal mechanosensory and motor center, a few antermal afferent nerve fibers projected into the protocerebrum and the suboesophageal ganglion. The mode of multiple projections may play an important role on the olfactory information integration, antennal movement adjusting, taste and feeding activity. Key words： Gryllus Bimaculatus; Antenna; Afferent nerve; Neuronal tracing

关 键 词：双斑蟋 触角 传入神经 神经元示踪标记 

分 类 号：Q965[生物学—昆虫学]