Tight muscles
Levator scapulae＋
Levator scapulae
Muscle dictionary
- Functions
- Elevates and downwardly rotates the scapula; with the scapula fixed; assists neck extension and same-side lateral flexion
- Origin
- Posterior tubercles of the transverse processes of the upper four cervical vertebrae
- Insertion
- Medial border of the scapula above the scapular spine
Pectoralis minor＋
Pectoralis minor
Muscle dictionary
- Functions
- Draws the scapula anteriorly and inferiorly against the thoracic wall; contributing to scapular downward rotation; and may assist forced inspiration when the scapula is fixed
- Origin
- Ribs three to five
- Insertion
- Coracoid process of the scapula
Upper trapezius＋
Upper trapezius
Muscle dictionary
- Functions
- Elevates the scapula and contributes to upward rotation; with the shoulder girdle fixed it can assist neck extension and side bending
- Origin
- External occipital protuberance, medial superior nuchal line, and ligamentum nuchae
- Insertion
- Lateral third of the clavicle and acromion
Weakened muscles
Lower trapezius＋
Lower trapezius
Muscle dictionary- Functions
- The lower fibers assist scapular depression and upward rotation and contribute to posterior tilt during arm elevation
- Origin
- Lower thoracic spinous processes
- Insertion
- Medial end of the scapular spine
Serratus anterior＋
Serratus anterior
Muscle dictionary
- Functions
- Protracts the scapula; assists upward rotation; and helps hold the scapula against the rib cage
- Origin
- Upper eight or nine ribs
- Insertion
- Anterior medial border of the scapula