As you review the muscle functions think in terms of functional groups.
|
Muscle |
Origin |
Insertion |
Action |
| Pectoralis major | Sternum | Humerus (pectoral ridge) | Adducts Humerus |
| Pectoralis minor | Sternum | Humerus (pectoral ridge) | Adducts Humerus |
| Brachialis | Humerus | Ulna | Flex forearm |
| Biceps brachii | Scapula | Radius | Flex forearm |
| Triceps brachii | Scapula, Humerus | Ulna | Extend forearm |
| Teres major | Scapula | Humerus | Retract arm |
| Spinodeltoid | Scapula | Humerus | Retract arm - abduct arm |
| Clavodeltoid | Clavicle | Humerus | Protract arm - abduct arm |
| Levator scapulae ventralis | Atlas, skull | Spine of Scapula | Move scapula anteriorly |
| Clavotrapezius | Skull, Cervical Vertebrae | Clavicle | Move clavicle anteriorly |
| Acromiotrapezius | Cervical, Thoracic Vertebrae | Scapula | Support/rotate scapula |
| Spinotrapezius | Thoracic Vertebrae | Spine of Scapula | Support/rotate scapula |
| Latissimus dorsi | Lumbar Fascia Thoracic Vertebrae | Proximal end of Humerus | Retract arm |
| Serratus ventralis | Ribs,Cervical Vertebrae | Scapula, medial surface | Support trunk, depress scapula |
| Infraspinatus | Scapula | Humerus | Retract Humerus |
| Supraspinatus | Scapula | Humerus | Protract Humerus |