Y neuron Y4 [FBbt_00003915]
Y neuron whose cell body fiber projects through the lobula plate without arborizing. It branches extensively in the second optic chiasm, with one branch doubling back to form a fine terminal arborization in lobula plate layers 1 and 2, multiple branches arborizing throughout the lobula with a mix of terminal morphologies and a single branch projecting into the medulla where it forms a wide asymmetric terminal arbor that projects mainly along medulla layer M9. 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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