The pectoralis major is a large chest muscle that is responsible for flexing, adducting, and internally rotating the arm at the shoulder joint. It also helps to stabilize the shoulder joint during movement.
The levator scapulae muscle primarily elevates and rotates the scapula (shoulder blade) downward and inward, allowing for movements such as shrugging the shoulders. It can also contribute to lateral flexion of the neck when acting unilaterally.
The Serratus Anterior muscle is responsible for holding the scapula against the chest wall. It helps stabilize the scapula and is important for proper shoulder movement and function.
The serratus anterior muscle is located between the scapula and ribcage. It has a serrated ("saw-like") appearance and is responsible for stabilizing the scapula against the ribcage during arm movements.
The trapezius muscle is an extensor muscle. It is responsible for extending and laterally flexing the neck, as well as retracting and elevating the scapula.
The muscle that depresses the scapula is the lower trapezius, while the muscle that elevates the ribs is the external intercostals.
The trapezius muscle is responsible for various movements of the shoulder and neck, such as elevation, depression, retraction, and rotation of the scapula. It also helps to extend and laterally flex the neck.
The scapula is not a muscle; it is a bone.
The pectoralis major is a large chest muscle that is responsible for flexing, adducting, and internally rotating the arm at the shoulder joint. It also helps to stabilize the shoulder joint during movement.
Trapezius - it elevates and depresses the scapula.
The supraspinatus muscle originates from the supraspinous fossa of the scapula.
The levator scapulae muscle primarily elevates and rotates the scapula (shoulder blade) downward and inward, allowing for movements such as shrugging the shoulders. It can also contribute to lateral flexion of the neck when acting unilaterally.
Raises the scapula at the Scapulothoracic Joint or inclines neck to corresponding side if the scapula is fixed
Serratus Anterior, moves scapula forward.
Platysma
Abducts scapula (moves scapula away from spinal column)
The strongest protractor of the scapula is the serratus anterior muscle. It originates from the upper ribs and inserts along the medial border of the scapula. Contraction of the serratus anterior muscle pulls the scapula forward around the rib cage.