What is the function of the 4th ventricle of the brain?

What is the function of the 4th ventricle of the brain?

The main function of this ventricle is to protect the human brain from trauma (via a cushioning effect) and to help form the central canal, which runs the length of the spinal cord. This ventricle has a roof and a floor.

What is obex in brain?

The obex (from the Latin for barrier) is the point in the human brain at which the fourth ventricle narrows to become the central canal of the spinal cord. The obex occurs in the caudal medulla.

Where does 4th ventricle drain?

the central canal of the spinal cord
The fourth ventricle is the most inferiorly located ventricle, draining directly into the central canal of the spinal cord.

Does the fourth ventricle produce CSF?

Cerebrospinal fluid (CSF) is secreted by the choroid plexuses, filling the ventricular system. CSF flows out of the fourth ventricle through the 3 apertures formed at the roof of the fourth ventricle by 12 weeks’ gestation.

Is the obex ventral or dorsal?

At the obex level, the ventral portion of the laminated Vc merges with the caudal Vi. Thus, rostral Vc with imperfectly laminated structures appears dorsally with Vi (ventral) at the same coronal plane to form the trigeminal Vi/Vc transition zone (Fig.

How does CSF leave the 4th ventricle?

From the fourth ventricle, the CSF may exit through the foramen of Lushka laterally, or the foramen of Magendie medially to the subarachnoid space. Passing through the foramen of Magendie results in filling of the spinal subarachnoid space.

What is the main cause of hydrocephalus?

Hydrocephalus is caused by an imbalance between how much cerebrospinal fluid is produced and how much is absorbed into the bloodstream. Cerebrospinal fluid is produced by tissues lining the ventricles of the brain.

What is found in fourth ventricle?

cerebrospinal fluid (CSF)
The fourth ventricle extends from the cerebral aqueduct (aqueduct of Sylvius) to the obex, and is filled with cerebrospinal fluid (CSF).

What is the fourth ventricle associated with?

CSF entering the fourth ventricle through the cerebral aqueduct can exit to the subarachnoid space of the spinal cord through two lateral apertures and a single, midline median aperture….

What type of weapon is obex?

The Obex is a set of Corpus-built hand and foot guards designed for close combat.

Where does most of the CSF go after it leaves the fourth ventricle?

How old is the oldest person with hydrocephalus?

The longest living hydrocephalic is Theresa Alvina Schaan (Canada) who was born on the 17 March 1941 and diagnosed with having congenital hydrocephalus. Also known as “water on the brain,” it is a condition in which there is extra cerebrospinal fluid (CSF) around the brain and spinal cord.

What is the best treatment for hydrocephalus?

The most common treatment for hydrocephalus is the surgical insertion of a drainage system, called a shunt. It consists of a long, flexible tube with a valve that keeps fluid from the brain flowing in the right direction and at the proper rate. One end of the tubing is usually placed in one of the brain’s ventricles.

What is cerebrospinal fluid?

Cerebrospinal fluid ( CSF) is a clear, colorless body fluid found within the tissue that surrounds the brain and spinal cord of all vertebrates. It replaces the body fluid found outside the cells of all bilateral animals.

What is the absorption of cerebrospinal fluid (CSF)?

Absorption of CSF is seen in amniotes and more complex species, and as species become progressively more complex, the system of absorption becomes progressively more enhanced, and the role of spinal epidural veins in absorption plays a progressively smaller and smaller role. The amount of cerebrospinal fluid varies by size and species.

Are there any conflicts of interest in the study of cerebrospinal fluid?

There are no conflicts of interest. References 1. Brown PD, Davies SL, Speake T, Millar ID. Molecular mechanisms of cerebrospinal fluid production. Neuroscience.

What is the best book on the neurobiology of cerebrospinal fluid?

“Neurobiology of Cerebrospinal Fluid” (J. H. Wood, Ed.), vol. 2, pp. 205-231. Plenum Press, New York. Bardon T., Ruckebusch M. Changes in 5-HIAA and 5-HT levels in lumbar CSF following morphine administration to conscious dogs. Neurosci. Lett. 1984;49:147–151. [PubMed] [Google Scholar] Baroni M., Heinold Y.