Dissection of the right anterolateral abdominal wall revealing the nerves of the transversus abdominis plane (TAP) and rectus sheath. White flag (1): level of umbilicus. White flag (2): anterior superior iliac spine. Red flag: pubic symphysis. Pins: purple L1, yellow T12, blue T11, pink T10, orange T9, green T8. RA: rectus abdominis muscle. LS: linea semilunaris. TA: transversus abdominis muscle. IO: internal oblique muscle. EO: external oblique muscle. F: fascial layer deep to internal oblique. (Courtesy Dr. Warren Rozen).
