The midbrain or mesencephalon lies between the forebrain anteriorly and the hindbrain posteriorly. It contains the optic tectum, torus semicircularis, torus longitudinalis and midbrain tegmentum.
You can explore the different regions of the zebrafish midbrain by selecting a region in the list below.
Schematic showing the regions that comprise the midbrain using the anatomical segmentation of 3 day old zebrafish larval brain by Thomas Müller, Olaf Ronneberger, Wolfgang Driever and colleagues. For details see Ronneberger et al., Nat. Meth. 2012 and http://vibez.informatik.uni-freiburg.de
Abbreviations: OT, optic tectum; Teg, tegmentum; TS, torus semicircularis.
Schematic showing the regions that comprise the midbrain using the anatomical segmentation of 3 day old zebrafish larval brain by Thomas Müller, Olaf Ronneberger, Wolfgang Driever and colleagues. For details see Ronneberger et al., Nat. Meth. 2012 and http://vibez.informatik.uni-freiburg.de
Abbreviations: OT, optic tectum; Teg, tegmentum; TS, torus semicircularis.
ADULT
Schematic drawing of a transverse section showing structures in the midbrain of an adult zebrafish. The optic tectum is composed of the neuropil layer tectum opticum(TeO) and the periventricular gray zone (PGZ)that contains the soma of the periventricular neurons of the tectum. In the adult the optic tectum has expanded in size and now internalises the torus semicircularis. Abbreviations: CIL, central nucleus of the inferior lobe; DIL, diffuse nucleus of the inferior lobe; DTN, dorsal tegmental nucleus; Hc, caudal zone of periventricular hypothalamus; Hd dorsal zone of periventricular hypothalamus; NMLF, nucleus of the medial longitudinal fasiculus; PG, preglomerular complex; PGZ, periventricular gray zone; TeO, tectum opticum; TL, torus longitudinalis; TLa, torus lateralis; TS, torus semicircularis; Va, valvula cerebelli; TeV, tectal ventricle.
