<qa>  What is the term for paramedian approach to subarachnoid spaces?Paramedian approach to the subarachnoid spaces is useful in situations where the patients anatomy does not favor the midline approach, e.g., inability to flex the spine or heavily calcified interspinous ligaments. Studies have shown that choice of midline or paramedian approach did not affect the success rate of the subarachnoid puncture in general. Therefore, this is a technique that worth to be studied. 