<prompt> Spinal Anesthesia should be injected into the space between:T12L1L3L4L1 L2L5S1  <response>: The LA is injected in the sub arachnoid space between L2-L3 or L3-L4. Spinal cord extends from medulla oblongata to lower border of L, in adult. Spinal; cord extends from medulla oblongata to lower border of L3 in infant neonate., adult level achieved at 2 years of age In infancy spinal; anesthesia given at L4-L5. Level In adult spinal anaesthesia given at L3-L4 OR L4rL5 space, even at L2L3 In. adult usually spinal anesthesia given at l3-l4 level Remember structures encountered during spinal anesthesia 1-skin, 2-subcutaneous tissue, 3-supraspinous ligament, 4-lnterspinous ligament, 5-ltgament flavum, 6-dura, 7-arachnoid. 