Carp (anatomy)

See also: Carp

The carpus is the area of the human body which corresponds to the Poignet. It articulates the Avant-bras with the Métacarpe.

It consists of 8 bones, divided into two lines:

First line:

pea-shaped Os or additional bone
Os triquetrum or pyramidal bone
Os scaphoïde
Os lunatum or semilunar bone

Second line:

trapezoidal trapezium bone
Os
Hamatum or hooked bone
Os capitatum or large bone

To remember easily the name of these bones, it is enough to gather them by two pennies the initials S - T - O - P :

S caphoïde
S emi-lunar
T rapèze
T rapézoïde
Large O S
O S hooked
P isiforme
P yramidal

This osseous system complexes gives a great freedom of movement to the hand.

These bones form a vault with dorsal concavity, delimiting a tunnel closed ahead by the annular ligament of the carpus, in which the flexor tendons of the hand, the arteries and the nerves pass.

The slightly hollow zone, located at the root of the inch, delimited well when the inch is in Abduction, is called the anatomical snuffbox. One feels there to beat the dorsal branch of the radial artery.

Pathology

The traumatisms of the hand or the wrist can give all kinds of distorsions, fractures or luxations of these bones, being able to cause more or less acute pains. The diagnosis is often difficult, and the treatment often requires the recourse to a specialized surgery.

The Syndrome of the carpel tunnel is a suffering of the median nerve related to a narrowness of the carpel tunnel.

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