T neuron T2 [FBbt_00003728]
T neuron whose soma sits in the cortex adjacent to the gap between the medulla and lobula plate. Their cell body fibers project through this gap before branching in the second optic chiasm. One branch projects into a medulla column, where it forms a bushy, fine, arborization in medulla layer M9 and then projects through the rest of the medulla column, forming fine arborizations in M1, M2 and M5. The other branch forms a terminal arborization in lobula layer 3 that is much wider than a single column and has bleb-type terminal branches. It seems to be capable of cholinergic and GABAergic neurotransmission. The acetylcholine neurotransmitter was assessed by co-labelling cells with a Cha-GAL4.7.4 driver [FBtp0014830] and an anti-ChAT antibody (Varija Raghu et al., 2011). The GABA neurotransmitter was assessed by the intersection of the expression of the VGAT-GAL4 driver (FBtp0069181) and an antibody against GABA (Raghu et al., 2013). Pre- versus postsynaptic innervation judged by scoring of terminal morphology from figures in Fischbach and Dittrich (1989) as assessed by FlyBrain Neuron DB.
Note
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