Accessory muscle breathing means using muscles other than those typically used for breathing to take in and expel air. One example is the subclavius — between the collarbone and the top rib — which ...

An intercostal muscle strain happens when you pull or partially tear the muscles between your ribs. You can do this by lifting, twisting, or being hit in the ribcage — but healing can take a while.

In years past, muscle injuries in the abdominal area were known by names such as ribcage strains, oblique strains, side strains, abdominal strains, or intercostal strains; with so many muscles ...