abnormal olfactory bulb morphology abnormal postnatal subventricular zone morphology abnormal olfactory bulb subventricular zone morphology 2010-02-04T11:38:44Z MA:0000974 MP:0009952 MPheno.ontology abnormal olfactory bulb SEZ morphology abnormal olfactory bulb SVZ morphology abnormal olfactory bulb subependymal layer abnormal olfactory bulb subependymal plate abnormal olfactory bulb subependymal zone morphology any structural anomaly of the region of mitotically active layer of cells surrounding the lateral brain ventricles that consists of migrating neuroblasts, astrocytes and transitory amplifying progenitor cells, that produce neurons that migrate to the olfactory bulb csmith