The wrist is the part of the upper limb between the bones of the forearm ( radial and ulnar ) and metacarpal bones (metacarpus), formed by eight bones. The bones of the wrist are arranged in two rows; bones of the distal row articulate with the metacarpal bones, proximal bones - with the radius.
| Wrist bones | |
|---|---|
 | |
| Catalogs | |
Unlike other structures of the hand (metacarpus and fingers), the wrist has no radiation structure.
Content
Wrist Structure
| Row | Bone name | Proximal / wrist joints | Distal joints | Metacarpal joints |
| Proximal | scaphoid | beam , lunar | trapezoid, trapezoid, capitate | - |
| Proximal | lunar | radial, scaphoid, trihedral | capitate, hook-shaped | - |
| Proximal | trihedral | lunate, pea-shaped | hooked | - |
| Proximal | pea-shaped | trihedral | - | - |
| Distal | trapezoid | scaphoid | trapezoid | first and second metacarpals |
| Distal | trapezoid | scaphoid | trapezium, capitate | second metacarpal |
| Distal | capitate | scaphoid, lunate | trapezoidal, hook-shaped | second, third and fourth metacarpals |
| Distal | hooked | trihedral, lunar | capitate | fourth and fifth metacarpals |
General structure of the wrist bones
All bones of the wrist, with the exception of the pisiform, have six surfaces. Palmar (front) surfaces of the bones are rough, palmar ligaments are attached to them. Both the upper (proximal) and lower (distal) surfaces of the bones are articular, while the upper surfaces form the articular heads, and the lower ones form the articular fossa. The lateral surfaces of the bones of the wrist are also articulated with each other.
Images
Bones of the brush.
Bones of the left hand, palmar surface.
Bones of the left hand, dorsal surface.
A vertical section through the joints of the wrist, showing articular cavities.
See also
- Wrist joint
Notes
Literature
- Wrist // Brockhaus and Efron Encyclopedic Dictionary : in 86 volumes (82 volumes and 4 additional). - SPb. , 1890-1907.