Shoulder and Rotator cuff

[Image 1] Identify the muscle highlighted in green: Located on the anterior thoracic wall, running horizontally along the inferior surface of the clavicle to the first rib.

Subclavius

[Image 2] Identify the muscle highlighted in green: Thick muscle arising from the inferior angle and lower lateral border of the scapula, inserting onto the medial lip of the intertubercular sulcus of the humerus.

Teres major

[Image 3] Identify the muscle highlighted in green: Large, multipennate muscle capping the shoulder joint, originating from the spine of the scapula, acromion, and lateral clavicle.

Deltoid

[Image 4] Identify the muscle highlighted in green: Rotator cuff muscle situated in the fossa superior to the scapular spine, inserting onto the superior facet of the greater tubercle of the humerus.

Supraspinatus

[Image 5] Identify the muscle highlighted in green: Rotator cuff muscle filling the broad fossa inferior to the scapular spine, inserting onto the middle facet of the greater tubercle of the humerus.

Infraspinatus

[Image 6] Identify the muscle highlighted in green: Elongated rotator cuff muscle running along the middle lateral border of the scapula, positioned superior to teres major.

Teres minor

[Image 7] Identify the muscle highlighted in green: Large triangular rotator cuff muscle covering the entire anterior (costal) surface of the scapula, inserting onto the lesser tubercle of the humerus.

Subscapularis