Transverse abdominal muscle

The transverse abdominal muscle ( lat. Musculus transversus abdominis ), located under the internal oblique abdominal muscle , is a thin muscle-tendon plate with the transverse direction of the muscle bundles, covered with its own fascia ^[1] . A muscle begins on the inner surface of the VII-XII ribs (here its muscle teeth are wedged between the teeth of the rib part of the diaphragm ), the inner lip of the iliac crest, the lumbo-thoracic fascia, the lateral third of the inguinal ligament. The bundles go horizontally forward and, not reaching the outer edge of the rectus abdominis muscle, pass into a wide aponeurosis along the line concave in the medial direction - the lunate (spigel) line (linea semilunaris). In the midline, the aponeurosis bundles are involved in the formation of the White line of the abdomen . A small number of bundles are separated from the lower sections of the transverse muscle, joining the same bundles from the internal oblique muscle of the abdomen , forming with them the muscle that lifts the testicle (musculus cremaster). It is the bottom of the triangle (rhombus) Lesgaft - Greenfelt or lumbar space ^[2] .