Biceps brachii vs Quadriceps femoris
| 속성 | Biceps brachii | Quadriceps femoris |
|---|---|---|
| 라틴어 명칭 | Musculus biceps brachii | Musculus quadriceps femoris |
| 유형 | Muscle | Muscle |
| 신체 계통 | Muscular | Muscular |
| 신체 부위 | Upper Arm | Thigh |
| 기능 | Primary supinator of the forearm and powerful flexor of the elbow. Also assists in shoulder flexion. The long head assists in shoulder joint stabilization. | The most powerful extensor of the knee joint. Essential for standing, walking, climbing stairs, and running. The rectus femoris also flexes the hip. |
| 임상적 의의 | Biceps tendon ruptures cause a visible bulge (Popeye deformity). Bicipital tendinitis causes anterior shoulder pain. The biceps reflex tests the C5-C6 nerve roots. | Quadriceps tendon rupture prevents active knee extension. Vastus medialis oblique weakness contributes to patellar maltracking. Quadriceps atrophy commonly follows knee injuries and surgeries. |
| FMA ID | 37670 | 22428 |
Full structure pages
Biceps brachii
Musculus biceps brachii
A two-headed muscle of the anterior compartment of the upper arm, the biceps brachii is the primary supinator of the forearm and a powerful flexor of the elbow, also assisting in flexion of the shoulder. …
Quadriceps femoris
Musculus quadriceps femoris
A four-headed muscle group of the anterior thigh, the quadriceps femoris is the most powerful extensor of the knee and is central to standing, walking, climbing stairs, and running. Its four heads, the rectus femoris, …