<qa>  What is the name of the quadratus lumborum block?Quadratus lumborum block QLB is an abdominal plane block with increasing popularity. QLB is achieved by local anesthetic infiltration at the anterolateral aspect of quadratus lumborum muscle QLB-I, or at the posterior aspect of the muscle QLB-II, or transmuscular QL-TM block. Ultrasound-guided technique is the usual route used for QLB performance. QLB had been considered a modification of transversus abdominis plane TAP block4. A cadaveric study had showed similar local anesthetic spread in both QL and TAP blocks. 