Anatom3DSerratus posterior inferior
Musculus serratus posterior inferior · Dolní zadní pilovitý sval
Muscles
Looks like
A thin muscle in the lower back, from the spines of the lowest chest and upper lumbar vertebrae to the lowest four ribs.
What it does
Pulls the lower ribs down and back; its role in breathing is small.
Keeping it well
Occasionally a source of muscle pain in the lower back.