Internal intercostal muscle 13
Musculus intercostalis internus XIII
Draws the ribs back and together in expiration; its part between the costal cartilages may help inspiration.
About the internal intercostal muscle 13 of the horse
Internal intercostal muscle 13 is a muscle of the body (trunk), one on each side of the body. Its name in the Nomina Anatomica Veterinaria is Musculus intercostalis internus XIII. You can turn it above, see it in place in the body of the horse, and open it inside the whole animal in Vetomica.
Where it runs from and to
A muscle is told apart from its neighbours by what it takes hold of at each end, which is also what decides what it does when it shortens.
- Origin
- The cranial border of a rib and its costal cartilage.
- Insertion
- The caudal border of the rib in front of it, the fibres running cranioventrally.
- Action
- Draws the ribs back and together in expiration; its part between the costal cartilages may help inspiration.
- Nerve
- The intercostal nerves (ventral branches of the thoracic nerves).
Written for Vetomica in its own words from the standard reference anatomy of the horse; the books it was checked against are listed below.
Terminology
- English
- Internal intercostal muscle 13
- Latin (NAV)
- Musculus intercostalis internus XIII
- Status
- A valid term in the Nomina Anatomica Veterinaria
Questions about the internal intercostal muscle 13
- What is the Latin name of the internal intercostal muscle 13?
- In the Nomina Anatomica Veterinaria, the internal intercostal muscle 13 is called Musculus intercostalis internus XIII.
- Where is the internal intercostal muscle 13 of the horse?
- Internal intercostal muscle 13 is a muscle of the body (trunk), one on each side of the body.
- Where does the internal intercostal muscle 13 originate and insert?
- Origin: The cranial border of a rib and its costal cartilage. Insertion: The caudal border of the rib in front of it, the fibres running cranioventrally.
- What nerve supplies the internal intercostal muscle 13?
- The intercostal nerves (ventral branches of the thoracic nerves).
- What does the internal intercostal muscle 13 do?
- Draws the ribs back and together in expiration; its part between the costal cartilages may help inspiration.
See the internal intercostal muscle 13 inside the whole horse.
Vetomica opens on this structure with every layer of the horse around it: peel back the skin and the muscles, cut a section through it, X-ray it, and practise naming it until you stop getting it wrong.
Free for 7 days, no card. After that the skeletons stay free.
