Question

Trace a drop of CSF from a lateral ventricle to reabsorption at an arachnoid granulation.

Answer 1

The choroid plexus of the ventricles (70 percent of the volume) produces the majority of CSF; the choroid plexus of the lateral ventricles produces the rest. The remaining CSF is produced by transependymal flow from the brain to the ventricles.

Answer 2

EMERGENCIES

Normal route of CSF from production to clearance is the following: From the choroid PLEXUS , the CSF flows to the lateral ventricle, then to the interventricular FORAMEN of Monro, the third ventricle, the cerebral aqueduct of SYLVIUS , the fourth ventricle, the two lateral foramina of Luschka and one MEDIAL foramen.

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