fourth ventricle true rhombencephalic vesicle CALOHA:TS-2015 AAO:0011043 4th ventricle 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] DMBA:126651782 hindbrain ventricle MA:0000196 ventricle of rhombencephalon DHBA:10669 NCIT:C12828 uberon MESH:D020546 UBERON:0002422 ventricle of hindbrain EMAPA:16917 rhombencephalic ventricle BIRNLEX:1256 BM:Pons-4V GAID:610 ZFA:0000110 DHBA:12805 OpenCyc:Mx4rv-7Q6pwpEbGdrcN5Y29ycA fourth ventricle proper BAMS:V4 TAO:0000110 VHOG:0000006 EV:0100310 UMLS:C0149556 ventricle IV ventriculus quartus Part of the ventricular system of the brain, forming a single large irregularly shaped cavity located on the midline of the rhombencephalon, between the medulla, pons and the isthmus ventrally and the cerebellum dorsally. It is continuous with the cerebral aqueduct anteriorally and the central canal of the spinal cord posteriorly. It communicates with the subarachnoid space through its lateral and median apertures. https://www.ncbi.nlm.nih.gov/pubmed/22091816 EHDAA:896 EHDAA2:0000100 IVth ventricle BAMS:4V BTO:0003426 Irregularly shaped cavity in the rhombencephalon, between the medulla oblongata, the pons, and the isthmus in front, and the cerebellum behind. It is continuous with the central canal of the cord below and with the cerebral aqueduct above, and through its lateral and median apertures it communicates with the subarachnoid space.[AAO] MBA:145 FMA:78469 Fluid-filled brain cavity. Kimmel et al, 1995.[TAO] XAO:0003099 HBA:9421 The fourth ventricle is an irregularly shaped cavity in the rhombencephalon, between the medulla oblongata, the pons, and the isthmus in front, and the cerebellum behind. It is continuous with the central canal of the cord below and with the cerebral aqueduct above, and through its lateral and median apertures it communicates with the subarachnoid space[GO][GO:0021592]. brain ventricle