0 relating to the metacarpals (= the five bones between the fingers and the wrist) and the phalanges (= the small bones of the fingers): --
metacarpophalangeal joints
On either side of the head is a tubercle for the attachment of the collateral ligament of the metacarpophalangeal joint.
Anatomically, it is said that the knuckles consist of the metacarpophalangeal and interphalangeal joints of the finger.
The bone itself is located between the joints called the metacarpophalangeal joint and the carpometacarpal joint.
Exercises to strengthen lumbricals, strengthen flexion in the metacarpophalangeal joint, and extension in the interphalangeal joints are beneficial.
All three intrinsic groups of muscles pass palmar to the axis of the metacarpophalangeal joints and therefore contribute to flexion there.
The muscle is inserted onto the radial sesamoid bone of the metacarpophalangeal joint.
In rare cases, sesamoid bones have been found in all the metacarpophalangeal joints and all distal interphalangeal joints except that of the long finger.
The middle digits, which support most of its weight, are extended at the metacarpophalangeal joints and bent at the interphalangeal joints.
