Overview of Ventricles

Question 1

The ventricles are lined with choroid plexus which secretes cerebrospinal fluid (CSF)

True or False

Answer 1

True

Explanation

This statement is true: the ventricles are lined with choroid plexus which are modified capillary beds with ependymal cells that secrete CSF fluid.

Question 2

Which of the following ventricles is located in the diencephalon between the right and left thalamus?

Lateral ventricle
Third ventricle
Fourth ventricle

Answer 2

Third ventricle

Explanation

The third ventricle is located in the diencephalon. It is a vertical midline structure positioned between the right and left thalamus. The lateral ventricles are located in the cerebral hemispheres of the telencephalon; the fourt ventricle is located between the metencephalon and myelencephalon.

Question 3

Which of the following structures allows the lateral ventricles to communicate with the third ventricle?

Interventricular foramen

Cerebral aqueduct

Median aperture

Lateral apertures

Answer 3

Interventricular foramen

Explanation

The lateral ventricles communicate with the third ventricle via the interventicular foramen; the cerebral aqueduct is the communication between third and fourth ventricles (located in midbrain); median aperture (foramen of Magendie) & the lateral apertures (foramina of Luschka) are the communications between the fourth ventricles and the subarachnoid space.

Question 4

CSF is produced by choroid plexus that lines the ventricles.

True or False

Answer 4

True

Explanation

This statement is true: cerebrospinal fluid (CSF) is produced by choroid plexus that lines the ventricles.

Question 5

What are the key functions of CSF?

Provide buoyancy to the brain to prevent the weight of the brain from crushing nerves and vessles against the skull.

Protect the brain and spinal cord.

Assists with maintaining chemical stability in the brain.

Answer 5

Provide buoyancy to the brain to prevent the weight of the brain from crushing nerves and vessles against the skull.

Protect the brain and spinal cord.

Assists with maintaining chemical stability in the brain.

Question 6

What is the rate of production of CSF?

120-140 ml per hour

5-20 ml per hour

15-20 ml per hour

Answer 6

15-20 ml per hour

Explanation

The average rate of production of CSF is 15-20 ml/hour; the average volume of CSF in the adult is 120 to 140 ml.

Question 7

When there is a blockage of movement of CSF from the subarachnoid space to the venous system, this is known as ________________ hydrocephalus.

obstructive

communicating

normal-pressure

Answer 7

communicating

Question 8

An accumulation of CSF in the ventricles and around the brain secondary to a brain tumor is an example of congential hydrocephalus.

True
False

Answer 8

False

Explanation

This statement is false: hydrocephalus secondary to a brain tumor would be considered an acquired hydrocephalus.