palmar ligaments of metacarpophalangeal joints
thick, dense, fibrocartilaginous ligaments located on the anterior (palmar) aspect of the metacarpophalangeal joints, flanked by and connected to the collateral ligaments, forming the anterior portion of the joint capsule; the ligaments are grooved longitudinally (relative to the digit) to accommodate the long flexor tendons of the digit; on each side of the groove they are attached to both the deep transverse metacarpal ligaments and fibrous sheaths of the fingers; they are firmly attached to the base of the proximal phalanges, deepening the “socket” of the phalangeal bases to accommodate the heads of the metacarpals, to which they are loosely attached, permitting free movement.
Synonym(s): ligamenta palmaria articulationis metacarpophalangeaeTA, palmar plates
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