has developmental contribution from contributes to morphology of immediate transformation of brain midbrain TAO:0000128 EFO:0000919 MA:0000207 AAO:0010149 DMBA:16649 NCIT:C12510 EMAPA:16974 XAO:0000014 MESH:D008636 MBA:313 RETIRED_EHDAA2:0001104 BTO:0000138 BM:MB ZFA:0000128 BIRNLEX:1667 SCTID:279099009 CALOHA:TS-0630 EHDAA:3694 BAMS:MES MB FMA:61993 EHDAA2:0001162 VHOG:0000069 Wikipedia:Midbrain MAT:0000106 EV:0100242 mesencephalon HBA:9001 MIAA:0000106 DHBA:10648 The midbrain is the middle division of the three primary divisions of the developing chordate brain or the corresponding part of the adult brain (in vertebrates, includes a ventral part containing the cerebral peduncles and a dorsal tectum containing the corpora quadrigemina and that surrounds the aqueduct of Sylvius connecting the third and fourth ventricles)[GO]. regional part of brain mesencephalic neural crest ectoderm-derived structure presumptive midbrain structure with developmental contribution from neural crest