Final answer:
Muscles that move the pectoral girdle are classified as scapulohumeral. They consist of anterior and posterior muscles that stabilize and position the shoulder girdle, allowing for various movements, including the medial movement of the scapula.
Step-by-step explanation:
Muscles that move the pectoral girdle are classified anatomically as scapulohumeral muscles. These muscles are primarily responsible for the positioning and stabilization of the pectoral girdle, consisting of the shoulder girdle which is made up of the clavicle, scapula, and the proximal end of the humerus. T
he muscles involved include both anterior and posterior muscles. Anterior muscles such as the subclavius, pectoralis minor, and the serratus anterior, and posterior muscles like the trapezius, levator scapulae, rhomboid major, and rhomboid minor work together to stabilize and move the shoulder girdle. This muscular structure allows for various movements including medial movement of the scapula when the rhomboids contract, contributing to the posterior movement of the shoulder and upper limb.