Supinator

Meet the Supinator—the forearm wrap that flips your palm up. It starts on the lateral elbow and ulna, spirals to the top third of the radius, and its job is simple: supination. Elbow straight? Supinator is the star. Elbow bent? Biceps takes the spotlight. And that tingly weakness from gripping tools? The radial nerve dives through here at the Arcade of Frohse. Next time you twist a doorknob—thank your Supinator! #Supinator #Anatomy #Kinesiology #Forearm #RadialNerve