Molecular Regionalization of the Diencephalon

Molecular Regionalization of the Diencephalon

The anatomic complexity of the diencephalon depends on precise molecular and cellular regulative mechanisms orchestrated by regional morphogenetic organizers at the neural tube stage. In the diencephalon, like in other neural tube regions, dorsal and ventral signals codify positional information to specify ventro-dorsal regionalization. Retinoic acid, Fgf8, BMPs, and Wnts signals are the molecu...

Regionalization of the Developing Mouse Telencephalon: Cellular and Molecular Mechanisms

Studies on the Diencephalon

Material and methods ................................................ Description of nuclear masses ......................................... The dorsal thalamus .............................................. Anterior nuclear group ....................................... Medial nuclear group ........................................ Midline and commissural iiuclei ..................................

The middle perforated substance of the diencephalon.

The diencephalon, upper brain stem and other basal brain structures are supplied chiefly by penetrating branches of the cerebral arteries. We examined the retrochiasmatic space between the superior border of the pons and posterior edge of the optic chiasm in six randomly selected adult fresh brain specimens. Lateral or anterolateral to the mamillary bodies, two small quadrangular spaces (2.5 x ...

Development of the Diencephalon in the Rat

The development of the nuclei of the hypothalamus was examined in normal and X-irradiated embryos from day 13 (El31 to the day before birth (E22). The diencephalic neuroepithelium was subdivided into three lobes (dorsal, medial, and ventral) and two lobules (superior and inferior). The hypothalamus is derived from the ventral lobe and the inferior lobule. The ventral neuroepithelial lobe genera...