metakarpálne

Metakarpálne refers to the bones that form the palm of the hand. There are five metacarpal bones in each hand, numbered I to V, starting from the thumb side. These bones articulate with the carpal bones of the wrist proximally and with the phalanges (finger bones) distally.

The first metacarpal, associated with the thumb, is unique due to its saddle joint articulation with the trapezium carpal bone, allowing for a wide range of motion, including opposition. The other four metacarpals (II-V) articulate with the trapezoid, capitate, and hamate carpal bones.

The metacarpals are long bones, each consisting of a shaft, a base, and a head. The shaft is the long, curved central part. The base is the proximal end that connects to the carpals. The head is the distal end that forms the knuckle and articulates with the proximal phalanges.

These bones play a crucial role in hand structure and function, providing rigidity to the palm while allowing for the complex movements necessary for grasping, manipulation, and dexterity. Fractures of the metacarpals are common, often resulting from direct trauma or falls.