carpal bones

BONES OF HAND

Proximal: A=Scaphoid, B=Lunate, C=Triquetral, D=Pisiform

Distal: E=Trapezium, F=Trapezoid, G=Capitate, H=Hamate

The eight bones of the adult wrist are often described as cubical in shape with six surface.eachccarpal projections. the hook of the hamate and the pisiform underlie the medial edge of the palm at the base of metacarpal 5.

The scaphoid tubercle and trapzium crest underlie the laterla edge of the plam, at the base of the thumb metacarpal.

Carpel Tunnel : fibrous band stretched transversley between carpal elevation.

Proximal row incorporation ( from Radial to Ulnar) :

scaphoid-> articulate with radius

lunate-> // // //

triquetral

pisiform

Distal row of carplas (from Radius to Ulnar):

trapezium ( greater multangular)

trapezoid ( lesser multangular)

capitate

hamate

carpal bones each ossify from single center.

Many skeleton , especially those from archaeological sites, have incoplete hand because of the postmortem disturbance of the skeleton before excavation for exp, rodant

these animals often move smaller skeletal elements during their burrowing activities

seamoids, pisiform, terminal phalanges are often lose in excavation

confusion of carpale bone with tarsal bones.