Describe the circulation of CSF?

Cerebrospinal fluid (CSF) is produced by the choroid plexuses of the lateral, third and fourth ventricles Passes from the lateral ventricles to the third ventricle through the two interventricular foramina (foramen of Monro) passes from the third ventricle to the...

How and where is CSF reabsorbed?

Reabsorbed by the arachnoid granulations: Villi arising from the arachnoid mater Project into venous sinuses and veins Reabsorption occurs throughout the brain and spine 90% by villi of the sagittal and sigmoid Dural sinuses 10% by spinal villi Reabsorption due to...

Can you suggest any conditions that may cause hydrocephalus?

Obstructive Hydrocephalus Foramina of Monro Third Ventricle Aqueduct of Sylvius Fourth ventricle Basilar Communicating Hydrocephalus Arachnoid granuloma dysfunction:Post-infectious (meningitis / ventriculitis)Post-haemorrhagicNormal pressure hydrocephalus Aneurysmal...

What are the normal volumes of CSF?

Overall volume is between 100-150ml 2⁄3 within the ventricles 1⁄3 within the subarachnoid space around the spinal cord (35ml) Equates to ~10% of intracranial volume Related Pages: (5.6)...

What is the normal pressure of CSF?

CSF pressure is gravitational and varies with position In the lateral position normal pressure is 5-20 cm of H2O In the sitting position: Pressure in the lumbar region rises to 20-50 cmH20 Pressure in the cervical region may be sub-atmospheric Related Pages: (5.6)...