The portion of the diaphragm that arises from the upper lumbar vertebrae and from the medial and lateral arcuate ligaments.
See: right crus of diaphragm, left crus of diaphragm, lateral arcuate ligament, medial arcuate ligament.
Synonym: pars lumbalis diaphragmatis, vertebral part of diaphragm.
(05 Mar 2000)