Latest articles from Health and Medicine Info (http://www.health-n-medicine.info) http://www.health-n-medicine.info 2009-01-08T22:05:14+01:00 text/html 2008-08-20T05:58:18+01:00 http://www.health-n-medicine.info http://www.health-n-medicine.info/serratus-anterior-an-important-a8423.html The serratus anterior is a group of muscles connected to the rib cage that help stabilize the shoulder blades. If this muscle is poorly developed due to poor development or instability, the shoulder blade will wing out, or appear to protrude from the back.