abnormal neural tube morphology/development abnormal lamina terminalis morphology 2014-01-02T12:40:51Z MP:0012540 MPheno.ontology abnormal lamina cinerea morphology abnormal lamina terminalis of cerebrum morphology abnormal terminal plate morphology abnormal velum terminale morphology any structural anomaly of the anterior-most (rostral) portion of the wall of the neural tube, formed by closure of the anterior neuropore; the median strip of the anterior wall of the prosencephalon, which persists in a relatively unchanged state as the cerebral hemispheres grow out forward beyond the original anterior end of the prosencephalon; in the developed brain, the lamina terminalis remains as the thin rostral wall of the third ventricle, stretching from the bases of the major cerebral commissures (the anterior commissure, the commissure of the fornix, and the rostrum of the corpus callosum) to the dorsal surface of the optic chiasm csmith