click below
click below
Normal Size Small Size show me how
A&P1 Muscles 4of11
Muscles that Move the Pectoral Girdle
| Muscle | Origin | Insertion | Action |
|---|---|---|---|
| Trapezius | Occipital bone and spines of cervical and thoracic vertebrae | Clavicle, spine, and acromium process of scapula | Rotates scapula - various fibers raise scapula, pull the scapula medially, or pull scapula and shoulder downward |
| Serratus anterior | Outer surface upper ribs | Ventral surface of scapula | Pulls scapula anteriorly and downward |
| Pectoralis minor | Sternal ends of upper ribs | Coracoid process of scapula | Pulls scapula forward and downward or raises ribs |
| Levator scapulae | Transverse processes of cervical vertebrae | Medial margin of scapula | Elevates scapula |