Middle Phalanx of the Fingers, Posterior View

Description

Seen from the posterior (dorsal) aspect of an adult male hand, the phalanges are presented in continuity with the metacarpals and the carpal row, with the distal radius and ulna partially included at the proximal margin. Middle phalanges occupy the segment between the proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints of digits II to V, distal to the proximal phalanges and proximal to the distal phalanges, while the thumb appropriately lacks a middle phalanx. Across each finger, the middle phalanx lies centrally in the digit, with its base articulating proximally and its head forming the condylar surface distally, aligned in the longitudinal axis of the ray. Dorsal hand anatomy is where bony contour and joint alignment are easiest to read, so this posterior view supports teaching and assessment of PIP and DIP congruity, finger rotation, and malalignment after trauma. Middle phalanx fractures, including dorsal avulsion injuries at the base associated with volar plate disruption at the PIP joint, are common and often evaluated alongside subtle subluxation on lateral radiographs, but appreciating the dorsal surface and segmental relationships helps you anticipate where instability will declare itself. Short. Clear. Common use cases include skeletal modules in gross anatomy and radiographic anatomy courses, figure plates for hand surgery or emergency medicine texts covering phalangeal fracture patterns and reductions, and patient education materials explaining why a PIP injury can affect motion at both adjacent joints. It also fits well in exam-prep resources that teach finger ray anatomy and joint-level localization of pain after hyperextension injuries. Anatomical accuracy verified by SciePro's Medical Advisory Board.