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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
