title: Understanding spinal anesthesia.
authors.forename: M A
authors.initials: MA
authors.lastname: Gouveia
authors.forename: L E
authors.initials: LE
authors.lastname: Imbelloni
mesh_terms: D000775:Anesthesia, Spinal / Q000379:methods*; D006801:Humans; D011187:Posture; D013127:Spinal Nerves / Q000187:drug effects; D013346:Subarachnoid Space / Q000187:drug effects; D013997:Time Factors