Name

# Transversus Abdominus

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)