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Other Terms: Musculi intercostales interni, Musculus intercostalis interna, Muscle intercostaux internes
Musculus intercostales interni
Latin muscle parts
Thoracic wall – lateral musculature – middle layer
In English, this muscle’s name is the within (middle) muscle between the ribs. The word intercostal comes from the Latin terms inter meaning “between” and costa meaning “rib.”The Latin term internus means “within.”
Inferior border of superior rib
Superior border of adjacent inferior rib
Stiffen the chest wall to prevent paradoxical motion during descent of the diaphragm; move the ribs.
Intercostal nerves (T1 through T11)
Anterior intercostal arteries from the internal thoracic artery via the subclavian artery. Superior intercostal artery from the costocervical trunk of the subclavian artery. Posterior intercostal arteries from the aorta. Superior and lateral thoracic arteries from the axillary artery, along with branches from the pectoral branch of the thoracoacromial artery.
Musculi intercostales interni
Musculus intercostalis interna
Muscle intercostaux internes