Position for performing the sciatic popliteal nerve block. Patient in prone position with the lower limbs in neutral position. The anaesthetist is positioned on the opposite side of the block, with the monitor in front, aligned along the visual axis. Ergonomic position with no inadequate wrist, neck, shoulder or trunk posture. Volar grasp of the transducer with support for the hand. In-plane needle insertion with along-the-visual-axis approach.