A 45 year-old man presents after falling backwards on his elbow. He heard a pop and is now holding his elbow in 45 degrees of flexion. There is a posterior protuberance of the olecranon that makes you suspicious of a posterior elbow fracture. What motor functions should you test for in this patient?

Dr. Anton Helman is an Emergency Physician at North York General in Toronto. He is an Assistant Professor at the University of Toronto, Division of Emergency Medicine and the Education Innovation Lead at the Schwartz-Reisman Emergency Medicine Instititute. He is the founder, editor-in-chief and host of Emergency Medicine Cases.