Question: What Is The Fourth Ventricle?

What is the 4th ventricle of the brain?

The fourth ventricle is the last in the system – it receives CSF from the third ventricle via the cerebral aqueduct.

It lies within the brainstem, at the junction between the pons and medulla oblongata.

From the 4th ventricle, the fluid drains into two places: Central spinal canal – bathes the spinal cord..

Is the fourth ventricle in the hindbrain?

The fourth ventricle is a cavity of hindbrain connected to the third ventricle by a narrow cerebral aqueduct. The fourth ventricle is a diamond-shaped cavity located dorsal to the pons and upper medulla oblongata and anterior to the cerebellum (Fig.

Can enlarged brain ventricles be normal?

The brain may shrink in older patients or those with Alzheimer’s disease, and CSF volume increases to fill the extra space. In these instances, the ventricles are enlarged, but the pressure usually is normal.

Which part of the brain is the largest part?

cerebrumThe largest part of the brain, the cerebrum has two hemispheres (or halves). The cerebrum controls voluntary movement, speech, intelligence, memory, emotion, and sensory processing.

What causes small ventricles in the brain?

This finding is presumably due to non-specific and diffuse swelling of brain parenchyma, and is illustrated in cases of trauma, neoplasm, encephalitis, pseudotumor cerebri, metabolic disorder, and probable dilantin effect. It is likely that other causes will be encountered in the future.

What does it mean to have enlarged ventricles in brain?

Hydrocephalus is the abnormal enlargement of the brain cavities (ventricles) caused by a build-up of cerebrospinal fluid (CSF). Usually, the body maintains a constant circulation and absorption of CSF. Untreated, hydrocephalus can result in brain damage or death.

Where is the fourth ventricle located quizlet?

The fourth ventricle has a characteristic diamond shape in cross-sections of the human brain. It is located within the pons or in the upper part of the medulla.

What body system is the ventricle in?

The ventricular system is a set of four interconnected cavities known as ventricles in the brain. Within each ventricle is a region of choroid plexus which produces the circulating cerebrospinal fluid (CSF)….Ventricular systemLatinVentriculi cerebriMeSHD002552NeuroNames2497FMA2427875 more rows

What is ventricular systole?

Ventricular Systole refers to the phase of the cardiac cycle where the left and right ventricles contract at the same time and pump blood into the aorta and pulmonary trunk, respectively.

What is the largest ventricle in the brain?

Lateral ventriclesLateral ventricles. The largest cavities of the ventricular system are the lateral ventricles. Each lateral ventricle is divided into a central portion, formed by the body and atrium (or trigone), and 3 lateral extensions or horns of the ventricles.

What is a doula oblongata?

Medulla oblongata, also called medulla, the lowest part of the brain and the lowest portion of the brainstem. … The medulla oblongata plays a critical role in transmitting signals between the spinal cord and the higher parts of the brain and in controlling autonomic activities, such as heartbeat and respiration.

How is CSF removed from the brain?

Lumbar puncture is carried out under sterile conditions by inserting a needle into the subarachnoid space, usually between the third and fourth lumbar vertebrae. CSF is extracted through the needle, and tested.

How does CSF drain from the brain?

CSF flows from the lateral ventricles through two narrow passageways into the third ventricle. From the third ventricle, it flows down another long passageway known as the aqueduct of Sylvius into the fourth ventricle.

What is the function of the 4th ventricle?

The fourth ventricle extends from the cerebral aqueduct (aqueduct of Sylvius) to the obex, and is filled with cerebrospinal fluid (CSF). The fourth ventricle has a characteristic diamond shape in cross-sections of the human brain….Fourth ventricleTA25966FMA78469Anatomical terms of neuroanatomy9 more rows

What is the fourth ventricle continuous with?

The fourth ventricle is wedged between the cerebellum on one side and the brainstem on the other; it extends to, and is continuous with, the central canal of the spinal cord.

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. … The CSF from the subarachnoid space is eventually reabsorbed through outpouchings into the superior sagittal sinus (SSS) known as the arachnoid granulations.

What is the mid brain?

The midbrain is the topmost part of the brainstem, the connection central between the brain and the spinal cord. There are three main parts of the midbrain – the colliculi, the tegmentum, and the cerebral peduncles.

What three areas are by or around the fourth ventricle?

It is surrounded anteriorly by the pons and medulla, posteriorly by the cerebellum, and inferiorly by the spinal canal and spinal cord. At its superolateral portions, two channels drain CSF into the surrounding neural tissue. These are called the lateral apertures, or the foramina of Luschka.

What tube connects the third and fourth ventricles?

cerebral aqueductThe third ventricle is connected to the fourth ventricle via the cerebral aqueduct (also called the aqueduct of Sylvius).

Where does CSF drain?

CSF is mainly secreted by the choroid plexus and, to a lesser extent, by the interstitial compartment. It circulates rostrocaudally inside the ventricles and drains into the cerebellomedullary cistern (cisterna magna) through the median aperture (foramen of Magendie) of the fourth ventricle.