Ventricular System Of The Brain

Question 1

The human brain is suspended in the ___ and partially floats in the skull cavity

Answer 1

CSF - cerebrospinal fluid

Question 2

There are __ cavities in the brain called ventricles. They are all interconnected through narrow pipe-like openings.

Answer 2

4

Question 3

The CSF is produced primarily in the brain _________.

Answer 3

Ventricles

Question 4

The CSF circulates constantly from the _________ to the _______ of the brain and drains into the venous sinuses of the skull.

Answer 4

Ventricles

Surface

Question 5

CSF circulates (uni or bi ???) directionally…

Answer 5

Uni

Question 6

Pathology due to disruption of CSF circulation causes _____________.

Answer 6

Hydrocephalus

Question 7

The ____ ventricle is situated between the cerebellum posteriorly and the pons and roster all medulla anteriorly. It is shaped like a tent with a doubly peaked roof, the peaks protruding into the cerebellum.

Answer 7

Fourth

Question 8

The floor of this ventricle is sometimes referred to as the rhomboid fossa.

Answer 8

4th

Question 9

CSF exits out of the foramen of _______.

Answer 9

Luschka

Question 10

Describe the circulation pattern of CSF…

Answer 10

Lateral ventricles to 3rd ventricle to 4th to subarachnoid space to venous sinuses.

Question 11

_________ ___________ are small protrusions that pierce through the dura mater and allow CSF to exit and enter the blood stream.

Answer 11

Arachnoid granulations

Question 12

The largest arachnoid granulations lie along the _________ ________ _______.

Answer 12

Superior sagittal sinus

Question 13

Smaller arachnoid granulations are called _____.

They act as one-way valves.

Answer 13

Villi

Question 14

The rate of CSF production is relatively ___________ of blood pressure and intra-ventricular pressure.

Answer 14

Independent

Question 15

Fluid continues to be produced even if the path of its circulation is blocked. When this happens, CSF pressure rises, and ultimately the ventricles expand at the expense of the surrounding brain, creating a condition known as _____________.

Answer 15

Hydrocephalus

Question 16

CSF composition changes during infection. The composition of CSF is constant in health. Changes in its composition can be a helpful diagnostic tool.

Answer 16

That’s all folks

Question 17

This disorder is 8-10 times more common in women. Often no identified cause. Association with obesity and oral contraceptives. Increase in ICP.

Answer 17

Pseudotumor cerebri

Question 18

If CSF is infected with a bacteria, what will the protein, glucose, and WBC count look like?

Answer 18

Protein -> Very High
Glucose -> Low
WBC -> Very High