In tetrapods, the carpus is the sole cluster of the bones in the wrist between the radius and ulna and the metacarpus. The bones of the carpus do not belong to individual fingers (or toes in quadrupeds), whereas those of the metacarpus do. The corresponding part of the foot is the tarsus. Carpal bones are not considered part of the hand but are part of the wrist. The carpal bones allow the wrist to move and rotate vertically and horizontally.
|Row||Name||Proximal/radial articulations||Distal articulations||Metacarpal articulations|
|Proximal||Scaphoid||radius, lunate||trapezium, trapezoid, capitate||-|
|Proximal||Lunate||radius, scaphoid, triquetral||capitate, hamate||-|
|Proximal||Triquetral||lunate, pisiform (but NOT ulna)||hamate||-|
|Proximal||Pisiform (sesamoid bone)||triquetral||-||-|
|Distal||Trapezium||scaphoid||trapezoid||#1 and #2|
|Distal||Capitate||scaphoid, lunate||trapezoid, hamate||#2, #3 and #4|
|Distal||Hamate||triquetral, lunate||capitate||#4 and #5|
Common characteristics of the carpal bones: Almost each bone (excepting the pisiform) presents six (6) surfaces.
Of these the palmar or anterior and the dorsal or posterior surfaces are rough, for ligamentous attachment; the dorsal surfaces being the broader, except in the lunate.
The superior or proximal, and inferior or distal surfaces are articular, the superior generally convex, the inferior concave; the medial and lateral surfaces are also articular where they are in contact with contiguous bones, otherwise they are rough and tuberculated.
Acute Calcific Tendinitis of the Flexor Carpi Ulnaris Causing Acute Compressive Neuropathy of the Ulnar Nerve: A Case Report
Dec 01, 2012; ABSTRACTThis study reports a case of acute calcific tendinitis of the flexor carpi ulnaris in a 64-year-old woman. She presented...