Location, General Structure and Ependymal Cells of Sensory Circumventricular Organs
Located at seemingly strategic points in the brain’s ventricular system (Figure. 1, 2), the sensory CVOs are midline structures situated in the walls of the third and fourth ventricles. The subfornical organ and OVLT occupy the dorsal and ventral extremities of the lamina terminalis, which embryologically is the most anterior aspect of the developing central nervous system (Bayer and Altman 1987). The subfornical organ appears to guard the entrance of the third ventricle, at the point where the cerebrospinal fluid (CSF) from the lateral ventricles enters the third ventricle, and where its CSF begins to bathe the ventricular surface of the diencephalon and brain stem. At the posterior extremity of the brain, the area postrema, situated in walls of the fourth ventricle at the caudal end of the medulla oblongata, appears to guard the entrance to the central canal of the spinal cord.
KeywordsHexagonal Angiotensin NADPH Crest Reso
Unable to display preview. Download preview PDF.