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Palmar Carpometacarpal Ligaments
Connective Tissue

Palmar Carpometacarpal Ligaments

Ligamenta carpometacarpea palmaria

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Anatomical Relations

The palmar carpometacarpal ligaments are a series of fibrous bands that attach the bases of the metacarpal bones to the carpal bones on the palmar aspect of the hand. The ligaments are arranged as follows:

—the second metacarpal has two ligaments attaching to the trapezium and trapezoid;

—the third metacarpal had three ligaments attaching to the trapezoid, capitate, and hamate;

—the fourth metacarpal had two ligaments attaching to the capitate and hamate;

—the fifth metacarpal has a single ligament attaching to the hamate.

The first carpometacarpal joint also contains a palmar carpometacarpal ligament, which extends obliquely from the ulnar side of the base of the first metacarpal to the palmar surface of the trapezium.

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Function

The palmar carpometacarpal ligaments stabilize the carpometacarpal joints and permit limited gliding movements of the joints produced by the long flexor and extensor muscles of the digits.

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Joint Ligament

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Entheseal structures are widely located throughout the body and are represented by the interface between bone and several tissues including tendon, joint capsules and ligaments.

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