Iliocostalis thoracis
Musculus iliocostalis thoracis · Kyčelně-žeberní sval hrudníku
Muscles
Looks like
The middle part of the outer erector spinae column, running from the lower six ribs to the upper six ribs.
What it does
Keeps the chest part of the spine upright and bends it sideways.
Keeping it well
Sore with poor posture; varied movement helps. Chest back pain with fever, weight loss or at night needs a doctor.