Anatom3DSerratus posterior superior
Musculus serratus posterior superior · Horní zadní pilovitý sval
Muscles
Looks like
A thin muscle in the upper back, from the spines of the lowest neck and upper chest vertebrae to ribs 2–5.
What it does
Thought to lift the upper ribs; its breathing role is small.
Keeping it well
Sometimes a source of upper back pain beneath the shoulder blade.