Deltoid vs Pectoralis major
| 속성 | Deltoid | Pectoralis major |
|---|---|---|
| 라틴어 명칭 | Musculus deltoideus | Musculus pectoralis major |
| 유형 | Muscle | Muscle |
| 신체 계통 | Muscular | Muscular |
| 신체 부위 | Shoulder | Thorax |
| 기능 | The primary abductor of the shoulder joint. The anterior fibers flex and medially rotate the arm. The posterior fibers extend and laterally rotate the arm. Gives the shoulder its rounded … | A powerful adductor, flexor, and medial rotator of the arm at the shoulder. Essential for pushing movements, climbing, and arm-swinging activities. |
| 임상적 의의 | Deltoid paralysis from axillary nerve injury prevents arm abduction. The deltoid is a common site for intramuscular injections. Rotator cuff tears may cause compensatory deltoid overuse. | Pectoralis major rupture occurs during heavy bench pressing. Poland syndrome involves congenital absence of the pectoralis major. The muscle is used in pectoralis major flap reconstructive surgery. |
| FMA ID | 32521 | 9627 |
Full structure pages
Deltoid
Musculus deltoideus
Thick and triangular, the deltoid caps the shoulder joint and gives the shoulder its rounded contour. It is the primary abductor of the joint; its anterior fibers flex and medially rotate the arm, while its …
Pectoralis major
Musculus pectoralis major
A fan-shaped muscle of the anterior chest wall, the pectoralis major acts as a powerful adductor, flexor, and medial rotator of the arm at the shoulder, and is essential to pushing movements, climbing, and arm-swinging …