Explaining Biology on Instagram: "Cerebrospinal fluid (CSF) collection is one of the most precise and carefully performed procedures in modern medicine. Known as a lumbar puncture or spinal tap, it involves inserting a thin, sterile needle between the lower vertebrae to gently access the fluid that surrounds the brain and spinal cord. This clear, protective fluid holds vital clues about infections, inflammation, bleeding, and neurological conditions. The process may look intense, but it is done