part of overlaps continuous with synaptic neuropil subdomain subregion EDM of AMMC zone E subregion EDC of AMMC zone E fly_anatomy.ontology JON bundle EDC VFB:FBbt_00047912 bundle E dorsal in the commissure primary auditory center subarea EDC FlyBrain_NDB:10200 Subregion of AMMC zone E. This is a protrusion from the medial end of subregion EDM that is rich in the presynapses of Johnston organ neurons. This forms the commissure of JON, which crosses to the contralateral antennal mechanosensory and motor center. FBbt:00047912 JON-EDC bundle antennal mechanosensory and motor center subarea EDC Johnston organ neuron bundle EDC antennal mechanosensory and motor center zone E commissure of JON