Which muscle is known as muscle C in the given context?

The right supraspinatus is part of the rotator cuff group, which plays an essential role in shoulder stabilization and mobility. This muscle is located above the spine of the scapula and is primarily responsible for initiating abduction of the arm at the shoulder joint. In addition to its function as an abductor, the supraspinatus contributes to the stabilization of the humeral head within the glenoid cavity of the scapula, allowing for smooth and coordinated movements.

Given the anatomical and functional context, identifying it as muscle C suggests it holds significance in the matters being assessed, particularly regarding its role in shoulder mechanics. Understanding its positioning and functionality helps in grasping broader concepts related to shoulder injuries and muscular interactions during upper limb movements.