Lai [FBbt_00003746]

Lai

ID: FBbt_00003746

Intrinsic amacrine neuron of the lamina with arborizations spanning the proximal and distal lamina, whose cell body lies proximal to the lamina (Fischbach and Dittrich, 1989; Meinertzhagen and Sorra, 2001). It has extensive arborizations and forms a substantial number of presynaptic terminals with columnar neuron T1 and epithelial glia (Rivera-Alba et al., 2011). It receives strong input from each of photoreceptors R1-R6, and from lamina wide-field cells (Rivera-Alba et al., 2011). It is a glutamatergic neuron (Davis et al., 2020). There are approximately 210 of these cells on each side (Nern et al., 2025).

Cell connectivity in the lamina was determined by analysis of semi-automated EM reconstruction of 749 serial sections of 21 complete lamina cartridges. The number of synaptic connections for Lai (presynaptic/postsynaptic) in a single lamina cartridge with each cell type was the following: R1 (-/36), R2 (1/39), R3 (-/39), R4 (2/37), R5 (2/35), R6 (-/40), L1 (1/-), L2 (1/-), L3 (10/-), L4 (4/2), L5 (4/-), Lai (1), T1 (54/1), C2 (1/5), C3 (1/9), Lawf (-/24) and epithelial glia (87/-) (Rivera-Alba et al., 2011).