The bones of the fingers and thumb are called the phalanges. The phalanges are
    jointed to the palm's 5 bones known as the metacarpals. The 8 bones (called
    carpals) that make up your wrist are jointed to the 2 arm bones, the radius and the
    ulna.

               Hand bones

                                                    Hand Muscle

        The Carpal Tunnel

The carpal tunnel is the area under a ligament (a tough, elastic band of tissue that connects bones and organs in place) in front of the wrist. The median nerve, which passes through the carpal tunnel, supplies the thumb side of the hand. Repetitive movements of the hand and wrist can cause inflammation of structures (such as tendons and their coverings) that surround the median nerve. The inflammation may compress this nerve, producing numbness, tingling, and pain in the first 3 fingers and the thumb side of the hand--a condition known as carpal tunnel syndrome.

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