![]() ![]() Limited lateral motion and circumduction can also occur. The main movements that occur on this joint are flexion and extension. The metacarpophalangeal joints are multiaxial condyloid joints. This often causes a displacement of the fifth metacarpal fractures. These insertions also contribute to the rigid stability of the second and third metacarpals.Įxtensor carpi ulnaris inserts on the dorsoulnar aspect of the fifth metacarpal base. The flexor carpi radialis inserts at the base of the second metacarpal bone. The carpometacarpal joint of the thumb is highly mobile.Įxtensor carpi radialis longus and brevis tendon insert on the bases of the second and third metacarpals, respectively. Out of all metacarpals, the second and third metacarpals are fixed rigidly at the base whereas the fourth and fifth carpometacarpal joints are capable of at least 15° and 25° of motion, respectively. Metacarpals held together to one another are joined proximally and distally by ligaments. Together, the arrangement of metacarpals in hand also has a collective arch transversely. They are five in number and numbered as first, second, third, fourth and fifth from thumbside to little finger side.Įach metacarpal has a longitudinal arch with convexity on the dorsal side and concavity on dorsal side. Metacarpals are the long tubular bones between carpal bones and phalanges. The treatment is based on the metacarpal involved and location of the fracture.Ī degree of angulation which varies with the location of fracture is acceptable but malrotation is not. Metacarpal fractures are divided into fractures of metacarpal head, neck, shaft. They mostly occur between age group 10-30 years. The metacarpal neck is the most commonly fractured region which constitutes around 10% of all hand fractures. ![]() Metacarpal fractures account for 30-40% of all hand fractures. Metacarpal fractures are fractures of long tubular bones of hand that connect carpal bones to proximal phalanges. Clinical Presentation of Metacarpal Fractures. ![]()
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