Ventricular system

Question 1

Fill in the gaps

Answer 1

Question 2

Give the CSF flow through the ventricles

Answer 2

• Flows from the body of the lateral ventricles
• Through the interventricular foramen of monroe
• Into the 3rd ventricle
• Through cerebral aqueduct
• Into the 4th ventricle
• Has 3 apertures which allow it to disperse into subarachnoid space (x2 lateral apertures and 1x median aperture)

Question 3

Where can the lateral ventricles be found?

Answer 3

Within cerebral hemisphere

Question 4

Where can the 3rd ventricle be found

Answer 4

Between thalami

Question 5

Where can the 4th ventricle be found

Answer 5

Between pons + cerebellum

Question 6

What is the Choroid plexus

Answer 6

A network of blood vessels in each ventricle of the brain that produces CSF

Question 7

How is CSF produced

Answer 7

Produced in ventricles of brain by the passing of blood through tiny fenestrated capillaries within the subarachnoid space

Question 8

What do the plexus allow

Answer 8

Allow filtered blood plasma to be transferred to CSF and deposited within ventricles

Question 9

Describe CSF obstruction

Answer 9

• CSF accumulates upstream of a blockage
• The ventricles begin to swell and there’s ‘water on the brain’ - the abdomen and head swell
• To resolve a shunt can be placed for CSF drainage

Question 10

Describe the production and function of the CSF

Answer 10

Production - In the choroid plexus, about 500ml a day
Functions - Buoyancy, cushioning affect from trauma, transport of substances and provides stable environment