carpal bones

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car·pal bones

eight bones arranged in two rows that articulate proximally with the radius and indirectly with the ulna, and distally with the five metacarpal bones; in domestic mammals, bones of the proximal row are called radial, intermediate, ulnar, and accessory, whereas distal row bones are termed first, second, third, and fourth carpal bones.
Synonym(s): carpus (2) [TA], ossa carpi [TA]

carpal bones

the eight bones of the wrist, which are arranged in two rows, a proximal and a distal row, each consisting of four bones. The proximal row consists of the scaphoid (navicular), the lunate, the triquetrum, and the pisiform bones. The distal row consists of the trapezium (greater multiangular), the trapezoid (lesser multiangular), the capitate, and the hamate bones. Also called wrist.

car·pal bones

(kahr'păl bōnz) [TA]
Eight bones arranged in two rows that articulate proximally with the radius and indirectly with the ulna, and distally with the five metacarpal bones.
Synonym(s): carpus (2) [TA] .


refers to the two rows of carpal bones between the metacarpal bones of the hand and the wrist joint. Syn carpus. Fig facing .
Bones of the right wrist from the front.
Right wrist and radioulnar joints, from the front.

wrist joint

links the forearm bones to the proximal row of the carpal bones, allowing movement of the hand forward (palmar flexion), backward (dorsiflexion) and side-to-side (and combinations of these) by the action of muscles that have their origins in the forearm and around the elbow, and tendons that span the wrist to be inserted beyond it. wrist injury is most common in sports where a strong grip is required, especially with twisting, such as gymnastics, golf and tennis, or in throwing sports (causing soft tissue injuries), contact sports or where falls are likely such as boxing or horse riding (causing fractures). See also scaphoid bone.

scaphoid bone

a (tarsal) bone in the foot and a (carpal) bone in the wrist. Latter is commonly damaged by compression, causing scaphoid fracture, when there is a fall onto the outstretched hand in hyperextension. If the fracture involves the proximal third of the scaphoid, there is a high risk of non-union and threat of avascular necrosis, due to the poor blood supply.


pertaining to the carpus.

carpal bones
are located between the radius and ulna and metacarpals. Typically, there are six to eight bones, depending on the animal species, arranged in two rows and numbered from medial to lateral. See Table 10.
carpal canal syndrome
see carpal tunnel syndrome (below).
carpal flexion posture
at parturition the fetus is presented with the carpal joints flexed, thus increasing the diameter of initial parts entering the pelvic canal, resulting in dystocia in some patients.
carpal fracture
carpal instability/flexion syndrome
seen in young puppies, particularly Doberman pinschers and Shar peis; the carpi remain slightly flexed when standing and the paws are deviated inwards.
carpal organ
a group of vibrissae located on the posterior aspect of the forelimbs of cats, sensitive to touch. See also tactile hair organ.
carpal pad
see footpad.
carpal sheath
common synovial sheath in the forelimb of the horse, shared by the superficial and deep flexor tendons as they pass through the carpal canal.
carpal tunnel
the osseofibrous passage for the flexor tendons and median nerve, formed by the flexor retinaculum and the carpal bones.
carpal tunnel syndrome
a complex of signs resulting from compression of the median nerve in the carpal tunnel. In horses there is lameness with pain on extreme carpal flexion. There are no lesions on the anterior carpal bones.

Patient discussion about carpal bones

Q. I'm looking for natural/organic ways to deal with carpal tunnel syndrome. My Boss has Carpal Tunnel syndrome. I'm looking for some natural remedies to help her ease the pain.

A. I have found that MSM (GNC brand) 1500mg per day works for me. I talked to an Orthopedic Surgeon asking him why it works... he said "they really don't know why it works, but it works for many of my patients". When I stop taking my MSM the symptoms return so it is not a cure.

I have tried other brands of MSM and found the GNC brand works the best for me. It takes about 2 weeks to begin to see the results and several more weeks to get the full affect.

Q. what can i do to help my capentunnel without surgery?

A. a good friend of mine is a bike racer and did the surgery- it's not a bad solution as it seems...but you can try and put on a splint to stabilize the wrist. The splint is worn at night for several weeks. If this does not help, you may need to wear the splint during the day. Hot and cold compresses may also be recommended.

There are many ergonomic devices that can be used in the workplace to reduce the stress placed on the wrist. These include special keyboards, cushioned mouse pads, and keyboard drawers. Make sure the keyboard is low enough so that the wrists aren't bent upward during typing. You may also need to make changes in your work duties or recreational activities.

More discussions about carpal bones
References in periodicals archive ?
CBM for radicarpal joint is a physical therapy technique that includes moving the proximal row of carpal bones either dorsally to promote wrist extension or to the palmar side to promote wrist flexion.
MRI often reveals carpal bone cysts, commonly called bone ganglia, and demonstrates their relation to cortical defects, ligament injuries and associated soft tissue ganglia.
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).
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 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).
Features analysis of the carpal bones can reveal the important information for skeletal age assessment.
While investigating natural and human-caused mortality of moose (Alces alces) in Minnesota during 1972-2000, amount of marrow fat was estimated in femur, tibia, mandible, humerus, radius, tarsal, and carpal bones of individual moose.
Carpal tunnel syndrome is caused by compression of the median nerve where it passes through the carpal tunnel, the narrow opening in the hand consisting of the carpal bones of the wrist on the bottom and the carpal ligament on top.
Image slices show the carpal bones, the tendons and the soft tissue.