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internal intercostal muscle

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internal intercostal muscle
n.
Any of the muscles with their origin from the lower border of a rib, with insertion into the upper border of the rib below, with nerve supply from the intercostal nerve, and that contract during expiration and serve to maintain a tension in the intercostal spaces that resists mediolateral movement.


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It is done by the abdominal and internal intercostal muscles.
 
 
 
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