(redirected from Carpal bones)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.


1. the technical name for wrist
2. the eight small bones of the human wrist that form the joint between the arm and the hand
3. the corresponding joint in other tetrapod vertebrates



part of the upper (anterior) pentadactyl extremity of vertebrates, located between the forearm and the metacarpus.

In man, the carpus consists of two rows of small bones connected by intercarpal joints. The first row is made up of the scaphoid, lunate, triquetrous, and pisiform bones, which (except the pisiform) are linked to the radius (radiocarpal joint). The second row, consisting of the larger and smaller multangular, capitate, and unciform bones, is linked to the metacarpal bones (carpometacarpal joint). The carpus increases the mobility of the hand.

In animals, the carpus is the base of the front paw and is located between the antibrachium and the metacarpus.


The wrist in humans or the corresponding part in other vertebrates.
The eight bones of the human wrist.
(invertebrate zoology)
The fifth segment from the base of a generalized crustacean appendage.
References in periodicals archive ?
Extensor retinaculum, a fascia that holds the tendons of the carpal extensor muscles was observed in the distal row of the carpal bones.
GCT of carpal bones affected in 31% the hamate, in 24% the capitate, in 14% the scaphoid, in 10% the lunate, in 7% the triquetrum, in 7% the trapezium, in 7% the trapezoid, and multifocal appearance was found in 14% of all cases [4].
The mobilization involves pushing and moving the row of carpal bones either dorsally to increase wrist extension or to the palmar side to increase wrist flexion.
Indeed Afifi and Lu (2011) have previously commented that the overlapping of the carpal bones makes plain radiographs difficult to interpret and this has been supported by previous authors (Sadowski and Montilla, 2008).
14,15) Due to the limited blood supply of the lunate, especially the proximal pole, it is the main carpal bone vulnerable to post-traumatic avascular necrosis.
Greater arc injuries" are defined as carpal bone or radial styloid fractures prior to lunate dislocation due to slower applied load (3).
After the carpal bones are exposed, cartilage damage is assessed, and soft tissue is debrided.
The back wall of the carpal tunnel is bound by the carpal bones and a band of strong tissue called transverse carpal ligament.
This syndrome is characterized by upper extremity malformations involving radial or carpal bones, and a personal and family history of congenital heart malformation, most commonly ostium secundum atrial septal defect.
These articulate with each other at the proximal and distal radio-ulnar joints and also with the carpal bones consisting of eight small bones.
The carpal tunnel is a space located posteriorly between the carpal bones of the wrist (moving from fight to left: trapezium, trapezoid, capitate, and hamate), forming the hard "carpal floor," and anteriorly, where the transverse carpal ligament forms a fibrous sheath or the "carpal roof" (see Fig 1).