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This muscle helps spread the ribs for a great inhale. It attaches onto the under surface of the shoulder blade and to the side of the rib cage. Multiple papers (here, here) have shown is that when this muscle becomes weakened or fails to properly activate, it can lead to unwanted movement within the shoulder joint and the shoulder blades.And this then creates various dysfunctions, such as: A forward rounded posture (Read my previous article: How To Fix Rounded … Many of the following techniques can even be done at home. Next, practice Activation exercises to strengthen and facilitate proper firing sequences of the following underactive muscles: Rhomboids (Upper Back Muscle), Mid and Lower Trapezius (Upper Back Muscles), Serratus Anterior (Shoulder Girdle Muscle), and the Cervical Flexors (Anterior Neck Muscles). Although an unappreciated muscle, the serratus anterior plays a significant role in stabilizing the shoulder joint and shoulder blade. The serratus anterior is the most important muscle that facilitates an upward rotation of the shoulder blade. Serratus anterior (SA) holds the scapula to the wall of the thorax. Serratus anterior dysfunction is just one of many reasons for shoulder dysfunction in breast cancer patients. The second commonly thought of function for the serratus anterior is ‘protraction’ of the shoulder blade, pushing it forward relative to the body in a punching motion. Actions on the scapula: Serratus anterior holds the scapula close to the rib cage and thus stabilizes it.During a forward movement of the upper arm, like during a boxing punch, it abducts (moves laterally, away from the spine) and protracts it (brings it forward). The serratus anterior muscle inserts exactly at the front border of the scapula, or shoulder blade. The most common sign of serratus anterior dysfunction is winging of the scapula. The serratus anterior is a muscle that originates on the surface of the 1st to 8th ribs at the side of the chest and inserts along the entire anterior length of the medial border of the scapula.The serratus anterior acts to pull the scapula forward around the thorax. However true scapular winging as a result of nerve damage to the long thoracic nerve innervating the serratus anterior muscle or other nerve palsy’s are both more disabling and fortunately not as common. In many cases, serratus anterior muscle pain treatment is similar to other muscle pain treatments. When these muscles are weak, we come crashing down. EXAMINATION Muscle Function: Origin Fixed: • Abduction (protraction) of the scapula. A further modification is the serratus plane block, in which local anesthetic is injected between the serratus anterior and latissimus dorsi muscles. Serratus Anterior Strength Test or Push Out Test is used to examine the serratus anterior muscle weakness and scapula winging. When one talks about winging of the scapula, true winging is due to serratus anterior muscle dysfunction. Patient in standing or sitting position. “When the serratus anterior muscles are weak, they contribute to neck problems, rotator cuff issues and scapular winging (damage to the long thoracic nerve of the shoulder),” Carnevale says. Ask the patient forward flexing of arm 90 degree. The rhomboids are shortened and contracted. Fig. The serratus anterior a muscle that originates on the top surface of the eight or nine upper ribs. When you reach overhead, this cooperative muscle forms a force couple with the upper and lower trapezius allowing for maximal upward rotation of the glenohumeral joint. Because the serratus anterior is located on the underside of the shoulder blade near the inner ribs, it’s hard to target and is often a neglected muscle. 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