What is lamina terminalis brain?
What is lamina terminalis brain?
The lamina terminalis is a thin sheet of gray matter and pia mater that attaches to the upper surface of the chiasm and stretches upward to fill the interval between the optic chiasm and the rostrum of the corpus callosum.
What does the lamina terminalis do?
The median portion of the wall of the forebrain consists of a thin lamina, the lamina terminalis, which stretches from the interventricular foramen (Foramen of Monro) to the recess at the base of the optic stalk (optic nerve) and contains the vascular organ of the lamina terminalis, which regulates the osmotic …
Where is lamina terminalis located?
Rhoton (1987) described the Lamina Terminalis as a triangular, transparent whitish membrane found at the base of the brain and forms the anterior wall of the third ventricle.
What is hypothalamic sulcus?
The hypothalamic sulcus (sulcus of Monro) is a groove in the lateral wall of the third ventricle, marking the boundary between the thalamus and hypothalamus.
What are thalamic nuclei?
The thalamic nuclei are the clusters of densely packed neuronal cell bodies that comprise the thalamus. The thalamus is an ovoid, paired gray matter structure, found in the center of the brain, just superior to the brainstem. Each side of the thalamus contains six groups of nuclei; Anterior nuclei of thalamus.
What is Postrema?
The area postrema is a medullary structure in the brain that controls vomiting. Its privileged location in the brain also allows the area postrema to play a vital role in the control of autonomic functions by the central nervous system. Specialized ependymal cells are found within the area postrema.
Why do Circumventricular organs lack blood-brain barrier?
In general, the CVOs consist of numerous capillary loops that, due to the fenestrated nature of the endothelial lining (which is the case for all but the SCO), lack a blood–brain barrier (BBB), allowing direct exchange between the blood and the nervous tissue of these organs.
Are Ovlt and SFO in the hypothalamus?
The OVLT and SFO lie, respectively, at the ventral and dorsal boundaries of the third ventricle (see Fig. 7-5). Because it lies at the rostral and ventral tip of the third ventricle, the OVLT is surrounded by cell groups of the preoptic region of the hypothalamus.