Name
Pronunciation
(il-e-o-kos-TA-lus lum-BOR-um)
Origin/Proximal Attachment
Common tendinous origin & medial iliac crest.
Insertion/Distal Attachment
Lower border of ribs (6), 7-12
Action/Relevance
Extends, laterally flexes & assists in rotation of the vertebral column; can depress the ribs
Innervation
Lower thoracic & upper lumbar nerves
Notes
Is inserted, by six or seven flattened tendons, into the inferior borders of the angles of the lower six or seven ribs.