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Major Muscles
Major Muscles & Their Actions
| Question | Answer |
|---|---|
| What are the major muscles that act at the shoulder girdle? | Trapezius, levator scapulae, rhomboid major and minor, pectoralis minor and serratus anterior. |
| Primary functions of the upper trapezius | Upper rotation and elevation of scapula |
| Primary functions of the middle trapezius | Upward rotation and adduction of scapula |
| Primary function of the lower trapezius | Depression of scapula |
| Primary function of levator scapulae | elevation of scapula |
| Primary functions of the rhomboid major and minor | Adduction, downward rotation, and elevation of scapula |
| Primary functions of the pectoralis minor | Stabilization, depression, downward rotation, and abduction of the scapula |
| Primary functions of the serratus anterior | Stabilization, abduction, and upward rotation of the scapula |
| What are the muscles of the rotator cuff? | Infraspinatus, teres minor, subscapularis, and supraspinatus |
| Primary function of the infraspinatus | External rotation |
| Primary function of the teres minor | External rotation |
| Primary function of the subscapularis | Internal rotation |
| Primary function of the supraspinatus | abduction |