Muscle Breakdown: Subclavius
Table of Contents
What Is the Subclavius
The Subclavius is a very small, skinny muscle that is in-between the 1st rib and the Clavicle. Most people have never heard of the Subclavius, however wearing heavy backpacks or carrying heavy bags can irritate the muscle.
Subclavius Function
While Subclavius is a very small muscle, it plays an important role to support the Clavicle. The main function of the Subclavius is to stabilize the Clavicle while the Shoulder is in movement.
Subclavius Origin And Insertion
Subclavius Origin
The origin of the Subclavius is Costal Cartilage at the Sternal end of Rib 1.
Subclavius Insertion
The insertion of the Subclavius is the Subclavian Groove of the middle third of the Clavicle.
Subclavius Innervation
The Subclavius is innervated by the Subclavian Nerve.
Subclavius Muscle Action
Not only does the Subclavius stabilize the Clavicle, it also helps to prevent injury of the vessels around the Clavicle in case of a fracture to the bone. The contraction of the Subclavius during certain movements also helps to avoid dislocation of the Clavicle.
Subclavius Blood Supply
The Subclavius receives its blood supply from the Clavicular branch of the Suprascapular Artery.
Subclavius Muscle Pain
Pain in the Subclavius can be the result of Costoclavicular Syndrome. This occurs when the space between the Clavicle and the 1st rib has narrowed, often from the Clavicle being decompressed. Depression of the Clavicle can occur from heavy backpacks or even tight bra straps.
Symptoms of pain in the Subclavius include,
Pain in the neck and shoulders
Pain that increases with activity, such as holding heavy bags
Pain that is relieved at night and increases as the day goes on
Treatment for Subclavius pain revolves around trying to increase the space between the Clavicle and the Rib. This can be done by strengthening the muscles that elevate the Clavicles and the Ribs such as the Pectorals Major and Minor and the Scalene. Additionally, strapless bras and having proper posture can help to alleviate symptoms. Finally, ice, heat and pain killers can also help to relieve pain.
Subclavius Muscle Stretch
Seated Clavicle Stretch
Sit down on the floor with your feet extended in front of you. Place both palms behind you flat on the floor with your fingers pointed behind you. Ensure that the shoulders are down and back. Push the chest forwards as you bring the shoulder blades together. You will feel a gentle stretch in the Subclavius. Hold this position for 30 seconds.
Subclavius Stretch
Stand perpendicular inside of a doorway. Place one arm flat against the wall behind you at shoulder height. Open the chest up until you feel a gentle stretch. Hold this position for 30 seconds
