olfactory bulb external plexiform layer EPL MA:0000969 BTO:0001319 BAMS:EPl olfactory bulb main external plexiform layer EMAPA:35607 OB outer plexiform layer external plexiform layer Cytoarchitectural part of the olfactory bulb, lying superior to the mitral cell layer and inferior to the glomerular layer. The EPL is mostly neuropil composed almost entirely of mitral and tulfted cell dendrites and granule cell dendrites and their synaptic inputs. DMBA:15913 UBERON:0005376 external plexiform layer of the olfactory bulb NLXANAT:20090403 olfactory bulb plexiform layer