mushroom body pedunculus fly_anatomy.ontology VFB:FBbt_00003687 stalk of mushroom body peduncle of mushroom body FBbt:00003687 stalk of corpora pedunculata pedunculus peduncule of mushroom body peduncule peduncle A bundle of neuron projections of Kenyon cells, dense with synapses, that extends from the calyx of the mushroom body to the base of the mushroom body lobe system (Ito et al., 1997). PED synaptic neuropil domain mushroom body neuropil subdivision