Name
Pronunciation
(trans-VER-sus ab-DOM-I-nus)
Origin/Proximal Attachment
Inner lip of the iliac crest
Lateral 1/3 of the inguinal ligament
Thoracolumbar fascia to T11-L5 spinous processes
Cartilage of the lower 6 ribs
Insertion/Distal Attachment
Linea alba
Action/Relevance
Tenses the abdominal wall
Braces lumbar spine resisting flexion
Innervation
Intercostal nerves (7th-12th)
Iliohypogastric nerves (T12,L1)
Ilioinguinal nerves (T12,L1)