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.

Words nearby internal intercostal muscle

internal hemorrhage, internal hemorrhoid, internal hemorrhoids, internal iliac artery, internal iliac vein, internal intercostal muscle, internal jugular vein, internal market, internal medicine, internal obturator muscle, internal occipital crest