abnormal olfactory bulb layer morphology abnormal olfactory bulb external plexiform layer morphology 2010-02-04T11:34:28Z MA:0000969 MP:0009947 MPheno.ontology NLX:nlx_96 abnormal olfactory bulb EPL morphology any structural anomaly of the part of the olfactory bulb, lying superior to the mitral cell layer and inferior to the glomerular layer, which is mostly neuropil composed almost entirely of mitral and tufted cell dendrites, granule cell dendrites and their synaptic inputs csmith