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Torso/Shoulder Muscl
| Question | Answer |
|---|---|
| Latissimus dorsi | Origin: Thoracic/lumbar vetebrae + last ribs + iliac crest Insertion: Humerus Action: Prime extender/adductor of arm Comments: Think L lumbar |
| Deltoid | Origin: Clavicle/scapula Insertion: Humerus Action: Prime abductor of arm Comments: Think power |
| Trapezius | Origin: Occipital bone + C7 + Thoracic vertebrae Insertion: Clavicle/scapula Action: Adductor and stabilizer of scapula Comments: Opposite of deltoid |
| Pectoralis Major | Origin: Clavicle + sternum + costal cartilages + oblique muscle Insertion: Fibers of humerus Action: Prime flexor of arm, adductor, rotator Comments: Think major = 4 origins |