Triangular muscle Sternum

MUSCLES TRIANGULAR breastbone

SHORT DESCRIPTION

• Small muscle belly.

ORIGIN

• In the xiphoid process and on the back side of the sternum.

INSERTION 

• In the inner faces of the costal cartilages 2-6.

INNERVATION :  Intercostal nerves.

FUNCTION

• They are differentiations of internal intercostal muscles.
• They exist only in the intercostal spaces means (4, 5, 6, 7).
• Saltan 2 or 3 ribs.