Human Anatomy: Muscle Groups |
| Muscle Function & Other Pertinent Medical Information | |
| - DELTOID Abducts arm, anterior fibers flex and medial rotate, posterior fibers extend and lateral rotate - | |
| ORIGIN: | Lateral third of clavicle, acromion, spine of scapula to deltoid tubercle |
| INSERTION: | Middle of lateral surface of humerus (deltoid tuberosity) |
| ACTION: | Abducts arm, anterior fibers flex and medial rotate, posterior fibers extend and lateral rotate |
| NERVE: | Axillary nerve (C5, 6) (from posterior cord) |