has soma location receives synaptic input in region sends synaptic output to region adult optic lobe neuron medulla layer M6 medulla serpentine layer medulla layer M8 medulla layer M9 medulla tangential neuron medulla tangential neuron Mt4 Mt4 medullary tangential neuron Mt4 Pm10 Medulla tangential neuron that principally extends along the border of the serpentine layer and medulla layer M8 for approximately their anterior two-thirds. It shows extensive fine and bleb-like arborizations in medulla layers M8 and M9, but only fine arborizations in the serpentine layer and layer M6. It is a cholinergic neuron (Varija Raghu et al., 2011). There are around 25 of these cells per hemisphere (Nern et al., 2025). FlyBrain_NDB:10036 FBbt:00003840 Mt4 fly_anatomy.ontology Pm9 VFB:FBbt_00003840 The 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). Pre- versus postsynaptic innervation judged by scoring of terminal morphology from figures in Fischbach and Dittrich (1989) as assessed by FlyBrain Neuron DB. visual system neuron adult cholinergic neuron cell body rind of adult lobula