اناٹومی مطالعاتی نوٹ · Upper limb

Wrist joint

A synovial ellipsoid joint between the distal radius and articular disc above and the scaphoid, lunate and triquetrum below.

اہم نکات

Synovial ellipsoid: radius + disc ↔ scaphoid, lunate, triquetrum.
Ulna is NOT part of the wrist joint (disc in between).
Moves in flexion, extension, abduction, adduction; no rotation.
Adduction > abduction (radial styloid is longer).
Fall on the outstretched hand: child-epiphysis, teen-clavicle, young adult-scaphoid, elderly-Colles.
Joint: from mesenchyme between bone ends.
Synovial cavity forms in the middle layer.
Synovial membrane: type A (phagocytic) + type B (secretory) cells.
Joint surfaces: hyaline cartilage, no perichondrium.

Relations · خصوصیات · Action · Nerve supply · Histology · Development · طبی اہمیت

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