Proximal Commissural Ligament, Anterior View

Description

Oriented on the palmar (anterior) aspect of the male hand, this illustration centers on the proximal commissural ligament spanning the deep base of an interdigital web space between adjacent digits. The band sits distal to the metacarpal heads and proximal to the bases of the proximal phalanges, crossing the volar side of the metacarpophalangeal region in a transverse direction. Flanking it, the metacarpals and phalanges provide bony reference points, with articular cartilage suggested by a subtle bluish-white tone at the joint margins. Spatially, the ligament lies superficial to the metacarpals but deep within the interdigital cleft, tethering the web as it transitions from palm to finger. Hand surgeons and therapists care about this structure because it helps define web space depth and resists pathologic splaying or contracture between digits. It becomes a practical landmark when assessing post-burn syndactyly, traumatic web space lacerations, or congenital web abnormalities, where scar and fibrosis can shorten the commissure and limit abduction at the metacarpophalangeal level. Planning a commissuroplasty or release depends on knowing what sits at the proximal margin of the web and how close it lies to the metacarpal heads. Small structure, big consequence. Use this anterior skeletal view when you need a clean teaching plate for gross anatomy of the hand, a figure for a plastic and reconstructive surgery chapter on web space reconstruction, or a therapy handout explaining why a first web or digital web contracture restricts pinch and grasp. It also fits exam prep materials that test metacarpal, phalangeal, and transverse palmar anatomy in a single glance. Anatomical accuracy verified by SciePro's Medical Advisory Board.