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Carpal Bones

Definition

Also known as wrist bones

8 in number

Arrangement

In two rows of 4 - proximal and distal rows

Proximal row : Pisiform, Triquetral, Lunate, Scaphoid

Distal row : Trapezium, Trapezoid, Capitate, Hamate

( a cneumonic to remember the names of the carpal bones - Please Take Lovely Susheela To The Coffee House)

Ligaments

These small bones are closely fitted together and held in position by ligaments

Proximal row : articulates in the wrist joint

Distal row : articulates with the metacarpals - carpometacarpal joints

Tendons of muscles lying in the forearm cross the wrist

These tendons are held close to the bones by strong fibrous bands calle retinacula

Movements

The range of movements in the joints of the carpal bones is very small

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