Name
Pronunciation
(o-BLEEK)
Origin/Proximal Attachment
Middle lip of the iliac crest; Linea alba; lower borders of the lateral 1/3 of the inguinal ligament; thoracolumbar fascia
Insertion/Distal Attachment
Unilateral: lower 3 or 4 ribs
Action/Relevance
Intercostal nerves (7th-12th) Rotates trunk to same side of contractionLaterally flexes trunk to same side of contraction Bilateral: Flexes the trunk4. Compresses the abdomen
Innervation
Iliohypogastric nerves (T12, L1) Ilioinguinal nerves (T12, L1)
Notes
The Obliques and the Transversus Abdominisincrease the intra-abdominal pressure necessary for the support of the vertebral column in some exercises.