The ventricle of the brain and the central canal of the spinal cord contain, a clear fluid similar to plasma called cerebrospinal fluid (CSF). CSF is formed by a group of cells called the choroid plexus located inside
the four ventricles. In human the volume of CSF is 150 ml and the rate of its secretion is 550 ml/day.
Functions:
1. CSF cushions the brain against mechanical shock when the head moves.
2. It acts as a protective covering for the CNS and confers buoyancy to brain.
3. The CSF also provides a reservoir of hormones and nutrition for the brain and spinal cord.
4. It acts as a mechanical buffer. Remaining inside and outside the CNS, it equalizes the mechanical pressure. If the intracranial pressure tends to rise the CSF is pressured out. If the pressure tends to fall, more CSF is retained.
the four ventricles. In human the volume of CSF is 150 ml and the rate of its secretion is 550 ml/day.
Functions:
1. CSF cushions the brain against mechanical shock when the head moves.
2. It acts as a protective covering for the CNS and confers buoyancy to brain.
3. The CSF also provides a reservoir of hormones and nutrition for the brain and spinal cord.
4. It acts as a mechanical buffer. Remaining inside and outside the CNS, it equalizes the mechanical pressure. If the intracranial pressure tends to rise the CSF is pressured out. If the pressure tends to fall, more CSF is retained.
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