The Proximal Phalanx's Head In A Posterior View

Description

Rotating in a posterior view, the animation isolates the head of a proximal phalanx of the hand as it broadens distally into a rounded condylar eminence. Dorsally, the articular surface curves to meet the base of the intermediate phalanx at the proximal interphalangeal (PIP) joint, while the nonarticular dorsal cortex remains proximal and slightly concave for extensor mechanism contact. As the sequence turns, the medial and lateral condyles become more apparent, defining the trochlear contour that guides flexion and extension and limits translation at end range. Understanding the dorsal morphology of the proximal phalangeal head matters when teaching PIP joint mechanics and when planning fixation around the joint line. Condylar fractures of the proximal phalanx can be subtle on standard radiographs, yet a small step-off along the dorsal articular margin can block motion or predispose to post-traumatic stiffness and early degenerative change. Motion clarifies what static figures often miss: how the condyles project in profile, where the dorsal lip sits relative to the joint surface, and why a few degrees of malrotation can alter joint congruence. Use this clip in hand and upper-limb anatomy curricula, orthopaedic and plastic surgery teaching on phalangeal fractures, and medical publishing layouts covering PIP joint osteoarthritis, boutonniere deformity biomechanics, or extensor tendon balance across the dorsal PIP. It also fits clinical education materials explaining dorsal surgical approaches and why articular reduction must respect the condylar contour. Anatomical accuracy verified by SciePro's Medical Advisory Board.