Anatom3DScalenus posterior
Musculus scalenus posterior · Zadní kýčovitý sval
Muscles
Looks like
The smallest, deepest scalene muscle, running from the lower neck vertebrae down to the second rib.
What it does
Lifts the second rib in deep breathing and helps bend the neck sideways.
Keeping it well
Scalene muscles work hard in breathlessness; visible neck-muscle use while breathing at rest is a sign of breathing difficulty.