Internal intercostal muscle 5
Musculus intercostalis internus V
Draws the ribs back and together in expiration; its part between the costal cartilages may help inspiration.
- System
- Muscle
- Region
- Thorax
- Sides
- Paired: left and right
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 5
- Latin (NAV)
- Musculus intercostalis internus V
- Status
- A valid term in the Nomina Anatomica Veterinaria
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