Ventricular System Wk2

Question 1

Describe the function of cerebrospinal
fluid (CSF)

Answer 1

Protection , homeostasis of fluid (electrolyte regulation), balance, circulates active molecules, eliminates catabolites (waste products from metabolism), decreased CSF turnover.

Question 2

How is CSF produced?

Answer 2

From the choroid plexus

Question 3

Name and describe the location of brain ventricles

Answer 3

2 Lateral, 3rd ventricle b/w the
R & L thalamus and 4th ventricle b/w
the pons and cerebellum

Question 4

Identify and name locations where CSF is produced in the brain

Answer 4

Lateral, third & fourth ventricles lined with choroid plexus

Question 5

Describe the pathway of CSF flow
throughout the central nervous system from production to resorption

Answer 5

1) CSF is produced by the choroid plexus in ventricles
2) Leaves lateral ventricles and enters the 3rd via the
interventricular foramina
3)Passes into fourth ventricle via the cerebral aqueduct
4)Passes EITHER caudally into the central canal of the spinal cord OR
into the subarachnoid space via the two lateral and one median
apertures
5) CSF then flows around the cerebral hemispheres in sub-arachnoid space
6)CSF resorbed into venous system via dural venous sinuses – arachnoid
granulations

Question 6

How is CSF resorbed into venous system?

Answer 6

CSF is resorbed into venous system via dural venous sinuses – arachnoid
granulations through slow diffusion

Question 7

In arachnoid granulation, how is CSF drained?

Answer 7

Through slow diffusion

Question 8

What are the sub-arachnoid cisterns?

Answer 8

• Cisterna magna - largest
• Interpeduncular cistern
• Quadrigeminal cistern
• Pontine cistern

Question 9

Collection of CSF can be accessed via

Answer 9

Direct access can be gained to the
vertebral canal by a long needle inserted between the intervertebral spaces of the lumbar vertebrae OR via cisterna magna