has characteristic has soma location fasciculates with overlaps has synaptic IO in region medulla transmedullary neuron Tm fly_anatomy.ontology VFB:FBbt_00003788 An intrinsic columnar neuron of the optic lobe whose cell body lies in the distal cortex of the medulla and that projects through the medulla and optic chiasm into the lobula. All neurons arborize in the lobula and most, but not all, in the medulla (Fischbach and Dittrich, 1989). Tm neuron FBbt:00003788 Tm lobula second optic chiasma optic lobe intrinsic columnar neuron cell body rind of adult medulla unilateral