Vetomica
Create a free account

Internal intercostal muscle 2

Musculus intercostalis internus II

Draws the ribs back and together in expiration; its part between the costal cartilages may help inspiration.

System
Muscle
Region
Trunk
Sides
Paired: left and right
Internal intercostal muscle 2 (Musculus intercostalis internus II) of the horse, left side: a three-quarter view of the muscle.

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 2
Latin (NAV)
Musculus intercostalis internus II
Status
A valid term in the Nomina Anatomica Veterinaria
Join the community