This video summarizes the course of the radial nerve and its branches. All the extensor muscles of the forearm are organized with their respective nerve branch with an interesting rule of 2, 2 and 2. 0:12- introduction 1:00- course of the radial nerve 2:45- posterior compartment innervation 2:49- rule of 2, 2 and 2 6:45- posterior interosseous nerve