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Transversus abdominis

Other Terms: Transverse abdominal muscle, Transverse abdominal, Transversus abdominis muscle, Musculus transversus abdominis, Muscle transverse de l'abdomen

Muscle parts

None

Latin name

Musculus transversus abdominis

Latin muscle parts

None

Group

Abdominal wall – lateral musculature – internal layer

Etymology

In English, this muscle’s name is the crosswise muscle of the chest. The Latin term transversus means “crosswise” and comes from Latin trans meaning “across, beyond, or through” and the Latin verb vertere meaning “to turn.” The word abdomen is of uncertain etymology. Two possible origins of this word are from the Latin abdere meaning “to stow away,” which the abdomen does to the digestive organs. The other possibility is that it comes from adipem meaning “fat.”

Origin

Lateral third of inguinal ligament, anterior iliac crest, thoracolumbar fascia, and cartilages of lowest 6 ribs

Insertion

Linea alba

Action

Compresses the abdominal cavity

Nerve supply

Intercostal nerves (T7 to T11), subcostal nerve (T12), and iliohypogastric and ilioinguinal nerves (both from L1)

Blood supply

Numerous arteries supply and anastomose within this extensive muscle sheet including the superior and inferior epigastric arteries, posterior intercostal arteries from the three lowest rib spaces, the subcostal artery, the musculophrenic artery, superficial epigastric artery, superficial circumflex iliac artery, ascending branch of the deep circumflex iliac artery, lumbar arteries.

Latin

Musculus transversus abdominis

French

Muscle transverse de l'abdomen

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