part of characteristic of neuron projection bundle nervous system neuron projection bundle CARO:0001001 FBbt:00005099 nerve fiber VFB:FBbt_00005099 nerve fiber bundle fly_anatomy.ontology UBERON:0000122 A fasciculated bundle of neuron projections (GO:0043005), largely or completely lacking synapses. neuropil multi-cell-component structure synaptic neuropil subdomain synaptic neuropil domain cell body rind region Drosophila melanogaster fasciculated