lamina terminalis

The lamina terminalis forms the anterior wall of the third ventricle.

It closes on day 25 of embryogenesis giving rise to the lamina terminalis of the brain.

These regions include the organum vasculosum of the lamina terminalis and the subfornical organ.

Lamina terminalis cistern.

This is sensed by osmoreceptors in the organum vasculosum of the lamina terminalis, which trigger thirst.

The cistern of lamina terminalis is a cistern of the subarachnoid space in the brain.

In addition to thirst, the organum vasculosum of the lamina terminalis and the subfornical organ contribute to fluid balance by vasopressin release.

If the body is becoming fluid-deficient, this will be sensed by osmoreceptors in the organum vasculosum of lamina terminalis and subfornical organ.

As previously mentioned, the organum vasculosum of the lamina terminalis features neurons responsible for the homeostatic conservation of osmolarity.

Laterally it is continuous with the anterior perforated substances and anteriorly with a thin lamina, the lamina terminalis.

This particular cistern lies in front of (rostral to) the lamina terminalis and anterior commissure between the two frontal lobes of the cerebrum.

Organum vasculosum of the lamina terminalis (OVLT)

Other circumventricular organs are the area postrema in the brainstem and the organum vasculosum of the lamina terminalis (OVLT).

Finally, OVLT neurons have been observed to respond to temperature changes indicating that the organum vasculosum of the lamina terminalis is subject to different climates.

This plexus appears near the cribriform plate and travels posteriorly toward the olfactory trigone, medial olfactory gyrus, and lamina terminalis.

The organum vasculosum of the lamina terminalis (OVLT or supraoptic crest) is one of the circumventricular organs of the brain.

The subfornical organ is a sensory CVO situated in the lamina terminalis and lacking the BBB, the absence of which characterizes the circumventricular organs.

Osmoreceptors can be found in several structures, including the organum vasculosum of the lamina terminalis (OVLT) and the subfornical organ (SFO).

The two, anterior and superficial, nuclei are separated from the lateral and medial regions by the lamella superior and are everywhere surrounded by a capsule of white matter, including the lamina terminalis.

The "leaf" or extension of the chiasmatic cistern above the chiasma, which is separated from the optic recess of the third ventricle by the thin lamina terminalis, has been called the suprachiasmatic cistern.

Two of these sites, the subfornical organ and the OVLT (organum vasculosum of the lamina terminalis) are so-called circumventricular organs, where neurons are in intimate contact with both blood and Cerebrospinal fluid.

Forming a critical part of the anteroventral third ventricle and the midline of the lamina terminalis, the median preoptic nucleus occupies an anatomical position that allows it to play an important role in many aspects of homeostatic regulation.

The median preoptic nucleus, along with the organum vasculosum lamina terminalis (OVLT) and the subfornical organ (SFO) respond to changes in blood composition as well as neural input from receptors in blood vessels.

Cysts and tumors of the lamina terminalis extend into the suprachiasmatic cistern, as can pituitary tumors, or the cistern can be partially or completely effaced by injury and hematoma or by blockage of the cerebral aqueduct.

There are osmoreceptors already in the central nervous system, more specifically in the hypothalamus, notably in two circumventricular organs that lack an effective blood-brain barrier, the organum vasculosum of the lamina terminalis (OVLT) and the subfornical organ (SFO).