Chemosensory Lab, Department of Psychology, Norwegian University of Science and Technology, Trondheim, Norway.
J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2022 Nov;208(5-6):707-721. doi: 10.1007/s00359-022-01566-x. Epub 2022 Sep 16.
The olfactory pathways of the insect brain have been studied comprehensively for more than 40 years, yet the last decade has included a particularly large accumulation of new information relating to this system's structure. In moths, sharp intracellular recording and staining has been used to elucidate the anatomy and physiology of output neurons from the primary olfactory center, the antennal lobe. This review concentrates on the connection patterns characterizing these projection neurons, which follow six separate antennal-lobe tracts. In addition to highlighting the connections between functionally distinct glomerular clusters and higher-order olfactory neuropils, we discuss how parallel tracts in the male convey distinct features of the social signals released by conspecific and heterospecific females. Finally, we consider the current state of knowledge regarding olfactory processing in the moth's protocerebrum and make suggestions as to how the information concerning antennal-lobe output may be used to design future studies.
昆虫大脑的嗅觉通路已经被研究了超过 40 年，然而在过去的十年中，与该系统结构相关的新信息尤其大量积累。在飞蛾中，尖锐的细胞内记录和染色已被用于阐明来自初级嗅觉中心——触角叶的输出神经元的解剖结构和生理学。本综述集中于描述这些投射神经元的连接模式，这些神经元沿着六个独立的触角叶轨迹。除了突出功能上不同的神经球簇和更高阶嗅觉神经节之间的连接外，我们还讨论了雄性中平行的轨迹如何传递同种和异种雌性释放的社会信号的不同特征。最后，我们考虑了目前关于飞蛾原脑嗅觉处理的知识状态，并就如何利用有关触角叶输出的信息来设计未来的研究提出了建议。
