Cerebrospinal Fluid

Cerebrospinal fluidVentricular system Lateral & fourth ventricles Choroid plexus 60%, ependymal liningSubarachnoid space Foramen Luschka (lateral apertures) Foramen Magendie (medial aperture)

Contents: similar to blood, but almost protein-free.Daily production: 400-500 ml/dayCSF pressure: 130-150 mmH₂OFunction:• Buoyancy: reduces weight of brain: 1500g to 50g.• Protective cushion• Removes waste products• Provides nutrients• Maintain constancy of ionic composition and reservoir• Transport system• Lymphatic system