NORMAL ANATOMY
The brain of man is situated in the region of head called cranium.it is surrounded by some layers,called meninges.the outer layer is thick ,hard and fibrous,known as durameter and inner layer is thin,called piameter.it contains blood capillaries which supply food or nutrients and oxygen to the cells of brain.in the upper and lower region of thin layer a fluid is found,called cerebro-spinal fluid.and collect waste products, as well as provide lubrication.
PROCEDURE
A sample of the CSF will be taken from the lumbar area of the spine. This is called a lumbar puncture. the position used during lumbar puncture may be uncomfortable, but you must remain in the curled position to avoid moving the needle and possibly injuring the spinal cord. There also may be some discomfort with the needle prick and the insertion of the lumbar puncture.Headache after the test.Bleeding into the spinal canal.Brain herniation (if performed on a patient with increased intracranial pressure), which can result in brain damage and/or death.Damage to the spinal cord (particularly ithe patient moves during the test).
