Fig. 2.

Anatomy of the transversus abdominis release (TAR), left side of the abdominal wall. a Transverse section of the preparation plane in the cranial region, where the posterior layer contains the peritoneum and fascia of the transversus abdominis (synonym: endoabdominal fascia). b In the caudal region, the fascia of the transversus abdominis remains attached to it, and the posterior layer is formed only by peritoneum and preperitoneal adipose tissue. c Illustration of the TAR preparation on a cadaver (figure courtesy of Miguel Garcia-Ureña). Yellow circle in the cranial region (4), the endoabdominal fascia (including fascia diaphragmatica and fascia of the transversus abdominis) is part of the posterior layer; in the caudal region (3), the fascia of the transversus abdominis remains attached to the transversus abdominis. 1 posterior rectus sheath, 2 peritoneum, 3 endoabdominal fascia or fascia of the transversus abdominis, 4 transversus abdominis. (a, c from [12])