Posterior Interosseous Veins, Posterior View

Description

Posteriorly, the forearm skeleton is oriented by the ulna medially and the radius laterally, with the interosseous membrane spanning between them along the diaphyses and guiding the deep neurovascular plane. Paired posterior interosseous veins course on the dorsal aspect of the interosseous membrane, tracking the posterior interosseous artery and running deep to the extensor muscle mass. Distally, the venous channels approach the dorsal wrist and hand, where they communicate with dorsal metacarpal veins and digital venules over the metacarpals and phalanges; proximally, they ascend toward the elbow region to contribute to the deep venous return around the cubital fossa. A posterior perspective clarifies the relationship between the deep venous circulation and the posterior interosseous nerve as it traverses the extensor compartment after passing through the supinator. This is the corridor you think about in dorsal forearm approaches for fracture fixation of the radius or ulna, and in the anatomy underlying posterior interosseous nerve palsy (finger and thumb extension weakness) when swelling, hematoma, or iatrogenic retraction occurs in the proximal dorsal forearm. Small veins matter. Educators can drop this graphic into upper-limb anatomy labs to distinguish superficial dorsal venous networks from the paired deep veins that mirror arterial companions, and clinicians can use it in operative notes, atlas chapters, and patient-facing materials describing dorsal forearm incisions or deep venous drainage pathways. Anatomical accuracy verified by SciePro's Medical Advisory Board.