part of part of develops from develops from immediate transformation of neurectoderm cerebral hemisphere white matter ectoderm-derived structure lamina terminalis of neural tube future diencephalon future brain future forebrain white matter lamina of cerebral hemisphere lamina terminalis of cerebral hemisphere UBERON:0015117 EHDAA:4498 SCTID:361483008 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[MGI:anna] The remnant of the lamina terminalis in the developed brain. FMA:61975 lamina terminalis DHBA:12105 Wikipedia:Lamina_terminalis EHDAA:3500