Cerebrospinal fluid and lumbar puncture: the story of a necessary procedure in the history of medicine.

The aim of our work was to investigate the different historical stages that led gradually to the discovery of the anatomical structures that form and contain cerebrospinal fluid (CSF), until the Quincke idea, to collect the liquid directly at the lumbar level delivering to humanity a diagnostic tool present and absolutely irreplaceable in everyday clinical practice. This is done through consultation of all the historical medical literature, together with the critical examination of the original articles when available in the most rigorous chronological and speculative order, which enabled knowledge advancement.