T4 neuron
FBbt:00003731
T neuron with its cell body posterior to the lobula plate and a cell body fiber that projects through the lobula plate and via the second optic chiasma, with little or no arborization, to medulla layer 10 (Fischbach and Dittrich, 1989; Shinomiya et al., 2019). It forms a fine arborization in medulla layers M9 and M10 and its axon then doubles back across the second optic chiasma to form bleb-type arborizations in a single layer of the lobula plate (Fischbach and Dittrich, 1989; Shinomiya et al., 2019). It is a cholinergic neuron (Mauss et al., 2014; Shinomiya et al., 2014). There are a large number of these cells, which are generated from neuroblasts that amplify by symmetric division (type III) before generating the T4 (and T5) neurons (Mora et al., 2018).
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