brain morphology trait postnatal subventricular zone morphology trait Any measurable or observable characteristic related to the shape, structure, color, or pattern of the mitotically active layer of cells surrounding the brain ventricles in the adult that consists of migrating neuroblasts, astrocytes and transitory amplifying progenitor cells. SVZ morphology trait subependymal plate morphology trait Trait.ontology VT:0004275 subependymal layer morphology trait subependymal zone morphology trait