SIMON FRASER / ROYAL VICTORIA INFIRMARY, NEWCASTLE / SCIENCE PHOTO LIBRARY SIMON FRASER / ROYAL VICTORIA INFIRMARY, NEWCASTLE / SCIENCE PHOTO LIBRARY
Cerebrospinal fluid pressure. The hands of a hospital doctor are seen measuring spinal fluid pressure, after having performed a lumbar puncture (spinal tap). Clear cerebrospinal fluid can be seen reaching a certain height in the hand-held glass pipette. The fluid is being withdrawn by means of a hollow needle inserted into the subarachnoid space in the region of the lower back, usually between the third and fourth lumbar vertebrae. Cerebrospinal fluid pressure is a diagnostic tool used to detect disease or a disorder which may be affecting the spinal cord or brain.
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