What is the function of the lamina terminalis in the brain?

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 Ovlt?

The OVLT is located between the anterior-dorsal aspect of the preoptic recess of the third ventricle, and the prechiasmatic cistern that encloses the preoptic vascular plexus. On mid-sagittal images, the OVLT is located at the anterior wall of the third ventricle between the anterior commissure and the optic chiasma.

What does posterior commissure connect?

The posterior commissure (PC) is a transversely-oriented commissural white matter tract that connects the two cerebral hemispheres along the midline. It is a very important anatomical landmark which is thought to play a role in the visual system, however its functions are still largely unknown.

What is the fornix of the brain?

The fornix is a white matter bundle located in the mesial aspect of the cerebral hemispheres, which connects various nodes of a limbic circuitry and is believed to play a key role in cognition and episodic memory recall.

What are the 4 parts of the corpus callosum?

The corpus callosum has four parts: the rostrum, the genu, the body, and the splenium.

What is the lamina terminalis?

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.

How do Osmoreceptors work?

Osmoreceptors have aquaporin 4 proteins spanning through their plasma membranes in which water can diffuse, from an area of high to low water concentration. If plasma osmolarity rises above 290 mOsmol/kg, then water will move out of the cell due to osmosis, causing the neuroreceptor to shrink in size.

Which structure of brain is largest commissure?

corpus callosum
The corpus callosum (Latin: “tough body”), also known as the colossal commissure, is a wide, flat bundle of neural fibers beneath the cortex in the eutherian brain at the longitudinal fissure. It connects the left and right cerebral hemispheres and facilitates interhemispheric communication.

Where does the fornix receive its input?

The hippocampus receives inputs via the precommissural branch of the fornix from the nucleus basalis of Meynert, which is a portion of the substantia innominata and which in turn is a portion of the septal nuclei.

What is corpus callosum responsible for?

The two hemispheres in your brain are connected by a thick bundle of nerve fibres called the corpus callosum that ensures both sides of the brain can communicate and send signals to each other.

How is the superior lamina related to the corpus callosum?

It is closely related in function to the splenium of the corpus callosum, and injury to it may lead to disorders such as alexia. The superior lamina or stalk of the pineal body is called the habenular commissure and connects the habenular nuclei of the two cerebral hemispheres. Thus it is also a vital part of the epithalamus.

Where does the lamina terminalis attach to the chiasm?

Lamina Terminalis. 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.

Is the rostrum continuous with the lamina terminalis?

The rostrum is continuous with the lamina terminalis and connects the orbital surfaces of the frontal lobes. The genu is the bend of the anterior corpus callosum and the forceps minor is a tract that projects fibres from the genu to connect the medial and lateral surfaces of the frontal lobes.

Which is part of the corpus callosum contains nerve fibres?

These are the major parts of the corpus callosum, but are divisible into sub-parts for localization of structures. A thin lamina of nerve fibres, which form the rostrum of the corpus callosum, connects the genu to the upper end of the lamina terminalis.

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