Organization of the Hand |
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Hand Osteology |
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Scaphoid, Lunate, Trapezium, Triquetrium, Hamate, Capitate, Triquetral and Pisiform
- Five metacarpals
- Fourteen phalanges
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The Scaphoid bone |
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- Has a body, neck and head.
- The blood supply to the body is from the distal end
- Scaphoid fractures are common.
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| Other carpal bones |
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- Dislocations are common with the Lunate
- Triquetral makes contact with ulna at adduction
- The tendon of the flexor carpi ulnaris, pisohamate and piso-metacarpal ligament attach to the pisiform
- Trapezium characterized by grove for tendon of flexor carpi radialis. To it is attached the flexor retinaculum and radial collateral ligament
- Capitate is centrally placed and is the largest carpal bone
- Hamate affords attachment to flexor retinaculum and has rough dorsal and palmar surfaces for ligament.
- Capitate is first to ossify. Pisiform is last ( What is the order for the others? )
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| metacapals and phalanges : |
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Metacarpals are long bones with head, shaft and base.
The second metacarpal has the largest base and shaft
- The 14 phalanges bear heads, shafts and bases
- Note primary ossification centers for the shafts and secondary centers for base of 1 st and heads of other metacarpals
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