CSF

Question 1

Flow of ventricles

Answer 1

It circulates from the lateral ventricles to the foramina of Monro (Interventricular foramina), third ventricle, aqueduct of Sylvius (Cerebral aqueduct), fourth ventricle, foramen of Magendie (Median aperture) and foramina of Luschka (Lateral apertures), subarachnoid space over brain and spinal cord. It should be noted that the CSF moves in a pulsatile manner throughout the CSF system with nearly zero net flow. CSF is reabsorbed into venous sinus blood via arachnoid granulations.

Question 2

Where is CSF produced?

Answer 2

Choroid plexus

Question 3

Where should CSF be sampled from?

Answer 3

In the cauda equine. If the needle is inserted in L4-5, it’ll enter the subarachnoid space without impaling the spinal cords.

Question 4

Hydrocephalus?

Answer 4

water on the bran, failure to absorb enough CSF leads to dilatation of the ventricles. This can occur because of obstruction of flow in ventricles or scarring of the subarachnoid space

Question 5

Communicating hydrocephalus?

Answer 5

Intact ventricular pathways

Question 6

Non-communicationg hydrocephalus?

Answer 6

a block in the ventricles