External intercostal muscle
Musculus intercostalis externus I
Draws the ribs cranially in inspiration.
About the external intercostal muscle of the pig
External intercostal muscle is a muscle of the chest (thorax), on the left side. Its name in the Nomina Anatomica Veterinaria is Musculus intercostalis externus I. You can turn it above, see it in place in the chest of the pig, 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
- Caudal border of a rib.
- Insertion
- Cranial border of the rib behind it, the fibres running caudoventrally.
- Action
- Draws the ribs cranially in inspiration.
- Nerve
- Intercostal nerves.
Written for Vetomica in its own words from the standard reference anatomy of the pig; the books it was checked against are listed below.
Terminology
- English
- External intercostal muscle
- Latin (NAV)
- Musculus intercostalis externus I
- Status
- A valid term in the Nomina Anatomica Veterinaria
Questions about the external intercostal muscle
- What is the Latin name of the external intercostal muscle?
- In the Nomina Anatomica Veterinaria, the external intercostal muscle is called Musculus intercostalis externus I.
- Where is the external intercostal muscle of the pig?
- External intercostal muscle is a muscle of the chest (thorax), on the left side.
- Where does the external intercostal muscle originate and insert?
- Origin: Caudal border of a rib. Insertion: Cranial border of the rib behind it, the fibres running caudoventrally.
- What nerve supplies the external intercostal muscle?
- Intercostal nerves.
- What does the external intercostal muscle do?
- Draws the ribs cranially in inspiration.
See the external intercostal muscle inside the whole pig.
Vetomica opens on this structure with every layer of the pig 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.
