ABDOMEN. 155 



face of the great oblique and the anterior border of the 

 pubis. Action : Principal flexor of the vertebral 

 column. 



6. Transverse muscle of the abdomen. — Syno- 

 nyms. Lumbo-abdominalis, (G). Transversalis abdom- 

 inis, (P). Costo-abdominalis internus, (L). Situated on 

 the most internal part of the abdominal walls. It is 

 attached to the internal face of the false ribs, transverse 

 process of the lumbar vertebra8e,|xyphoid cartilage of 

 the sternum and linea alba. Action : Compresses the 

 abdominal organs against the spine. 



Muscles of the Sub-Lumbar Region.— Nine in num 

 ber, covered by the iliac fascia or lumbo-iliac aponeu- 

 rosis. 



1. Great psoas. — Synonyms. Sub-lumbo-trochineus, 

 (G). Lumbo-femoral, (L). Psoas magnus, (P). Sit- 

 uation : under the transverse processes of the lumbar 

 vertebrge. Attachments : On the body of the two last 

 dorsal and all the lumbar vertebrse, inferior face of the 

 two last ribs, transverse processes of the lumbar vertebrae 

 and internal trochanter of the femur. Action : Flexor 

 and rotator of the thigh, flexor of the lumbar 

 region. 



2. Iliac psoas. — Synonyms. Ilio-trochineus, (G). 

 Iliacus, (P). Composed of two fleshy bodies. Attach- 

 ments : On the iliac surface, external angle of the ili- 



