lumbar puncture

A lumbar puncture, also known as a spinal tap, is a medical procedure used to collect a small amount of cerebrospinal fluid (CSF) from the lower back. The CSF surrounds your brain and spinal cord, providing cushioning and protection. During the procedure, a healthcare provider inserts a thin needle into the lower back between two vertebrae, usually while you are lying on your side or sitting. The collected fluid can help diagnose infections, bleeding, or neurological conditions. The procedure is generally safe, performed under sterile conditions, and involves minimal discomfort.