Metakarpofalangalledder

Metakarpofalangalledder refers to the joints connecting the metacarpal bones of the hand to the phalanges (finger bones). These joints are crucial for hand dexterity and the ability to grip and manipulate objects. Each finger, excluding the thumb, has three phalanges: a proximal, middle, and distal phalanx. The metacarpal bone of each finger articulates with the proximal phalanx, forming the metacarpophalangeal joint. The thumb has only two phalanges, and its metacarpal articulates with the proximal phalanx to form the carpometacarpal joint, which functions similarly in this context.

These joints are synovial joints, meaning they are enclosed in a capsule filled with synovial fluid, which lubricates the articulation and allows for smooth movement. The metacarpophalangeal joints are condyloid joints, permitting a wide range of motion including flexion, extension, abduction, adduction, and circumduction. The range of motion at these joints is essential for tasks requiring fine motor skills. The stability of these joints is maintained by a complex network of ligaments, including the collateral ligaments and the palmar plate. Injuries to the metakarpofalangalledder, such as sprains, fractures, or dislocations, can significantly impair hand function. Conditions like arthritis can also affect these joints, leading to pain and stiffness.