Upper limb
Articular cartilage of the elbow (Trochlea, Capitellum, Radial head, Trochlear notch)
Cartilagines articulares cubiti
- Origin
- Hyaline cartilage covering humeral trochlea/capitellum, radial head fovea, and ulnar trochlear notch
- Insertion
- Opposing articular surfaces of humeroulnar and humeroradial joints
- Function
- Enables frictionless hinge motion and axial rotation of radial head on capitellum
- Innervation
- Avascular and aneural
- Movement & chain
- Hinge flexion-extension and rotational spinning during pronosupination
- Palpation
- Not palpated directly
- Clinical
- Osteochondritis dissecans (OCD of capitellum in overhead/gymnast athletes); post-traumatic osteoarthritis and loose bodies causing locking.
- Segmental innervation
- C5–C8
- In clinical practice
- Activity modification for juvenile OCD, arthroscopic debridement, and range-of-motion therapy
- Region in the model
- Upper limb