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NEUROPHYSIOLOGY

Cerebrospinal Fluid (CSF): Circulation of CSF

Choroid plexus of latcral venlricle (ph Antami

Cistern of corpus callosum

Dura

Superior sagittal sinus

Median aperture (foramen of Magendie)

space

Arachnoid granulations

Arachnoid

Choroid plexus of 3rd vcntricle Cerebral aqueduct (Syivius) Lateral aperture (foramen of Luschka) Choroid ploxus of 4th ventricle Dura mater Arachnoid

Subarachnoid Central canal of spinał cord

Figurę 2.11 Circulation of Cerebrospinal Fluilt

CSF circulates through the tour brain ventrides (two lateral ventricłes and a third and łourth ventricle) and in the subarachnoid space sur-rounding the brain and spinał cord. Most of the CSF is reabsorbed into the venous system through the arachnoid granulations and through the vvalls of tfu; capillaries of the central nervous system and pia mater. The subarachnoid space normally contains about 150 ml of CSF and the choroid ptexus produces about 500ml/day; hence, CSF turns over about three times every 24 hours.

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