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Rectus abdominis

Other Terms: Abs, Musculus rectus abdominis, Muscle droit de l'abdomen

Muscle parts

None

Latin name

Musculus rectus abdominis

Latin muscle parts

None

Group

Abdominal wall – ventral muscle

Etymology

The English name for this muscle is the straight muscle of the belly. The word rectus is Latin for “straight.” 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,” because the belly can be the source of lots of fat storage.

Origin

Crest of pubis

Insertion

Costal cartilages of ribs 5, 6, and 7

Action

Flexes the lumbar vertebral column; helps compress the abdominal cavity

Nerve supply

Intercostal nerves (T7 to T11) and subcostal nerve (T12)

Blood supply

Superior epigastric and inferior epigastric arteries; also receives supply from the superficial epigastric artery.

Latin

Musculus rectus abdominis

French

Muscle droit de l'abdomen

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