Direction Selectivityof TmY Neurites in Drosophila  

作　　者：Yinyin Zhao Shanshan Ke Guo Cheng Xiaohua Lv Jin Chang Wei Zhou 

机构地区：[1]Britton Chance Center for Biomedical Photonics,Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Neuroscience Bulletin》2023年第5期759-773,共15页神经科学通报（英文版）

基　　金：supported by grants from the National Natural Science Foundation of China(61890950 and 31871027);Fundamental Research Funds for the Central Universities/HUST(2016YXMS034 and 2014TS015);the Director Fund of WNLO,and the China Postdoctoral Science Foundation(2015T80788).

摘　　要：The perception of motion is an important func-tion of vision.Neural wiring diagrams for extracting direc-tional information have been obtained by connectome recon-struction.Direction selectivity in Drosophila is thought to originate in T4/T5 neurons through integrating inputs with different temporal filtering properties.Through genetic screening based on synaptic distribution,we isolated a new type of TmY neuron,termed TmY-ds,that form recipro-cal synaptic connections with T4/T5 neurons.Its neurites responded to grating motion along the four cardinal direc-tions and showed a variety of direction selectivity.Intrigu-ingly,its direction selectivity originated from temporal filtering neurons rather than T4/T5.Genetic silencing and activation experiments showed that TmY-ds neurons are functionally upstream of T4/T5.Our results suggest that direction selectivity is generated in a tripartite circuit formed among these three neurons—temporal filtering,TmY-ds,and T4/T5 neurons,in which TmY-ds plays a role in the enhancement of direction selectivity in T4/T5 neurons.

关 键 词：Direction selectivity TmY-ds-Synaptic connection Two-photon calcium imaging DROSOPHILA 

分 类 号：Q42[生物学—神经生物学]