human_reference_atlas part of Homo sapiens midbrain midbrain cerebral aqueduct http://upload.wikimedia.org/wikipedia/commons/d/da/Cn3nucleus.png BIRNLEX:1261 EHDAA:3696 EHDAA2:0001163 GAID:583 neuronames:509 medial tectal ventricle EMAPA:17795 aqueduct of Sylvius mesencephalic ventricle Part of ventricular system of brain consisting of a narrow channel in the midbrain connecting the third and fourth ventricles. (Maryann Martone). UBERON:0002289 SCTID:279249003 midbrain cerebral aqueduct Two distinct classes in ncit. We classify this as a brain ventricle even though it is not classifically regarded as one (3rd = diencephalon, 4th = hindbrains) aqueductus mesencephali MA:0000208 cerebral aquaduct mesencephalic vesicle DHBA:12369 UBERON:0005684 DMBA:126651722 EV:0100309 BAMS:AQ AS Wikipedia:Cerebral_aqueduct TAO:0000159 ZFA:0000159 aqueduct The early development of most vertebrate brains is similar (...). The zebrafish neural tube follows the same basic differentiation pattern as the mammalian neural tube (reference 1); The brain develops from three embryonic enlargements of the neural tube, which later differentiate into five regions. A forebrain differentiates into telencephalon and diencephalon. The midbrain, or mesencephalon, remains undivided. The hindbrain divides into the metencephalon and myelencephalon. Cavities within the brain enlarge to form a series of interconnected ventricles (reference 2).[well established][VHOG] NCIT:C32135 Sylvian aqueduct aqueductus mesencephali aqueduct of Sylvius MESH:D002535 ncithesaurus:Cerebral_Aqueduct ventricle of midbrain (cerebral aqueduct) BAMS:Aq cerebral aqueduct of Sylvius uberon mesencephalic duct ventricle of midbrain (cerebral aqueduct) BM:MB-AQ DHBA:10651 FMA:78467 HBA:265505702 cerebral aqueduct proper MBA:140 VHOG:0000832 cerebral aqueduct midbrain ventricle aqueduct of midbrain tectal ventricle UMLS:C0007769 EFO:0003501 aqueduct (Sylvius) brain ventricle