The ability to move our elbows is required for using our arms during daily activities. We would not be able to reach our face to eat or our feet to put on shoes without our elbows.
Three bones make up the elbow: the long bone closer to your shoulder is the humerus, and the two forearm bones are the radius and ulna. See the image above to get an idea of the location of these bones.
The radius and ulna are involved in bending and straightening the elbow as well as turning the palm up and down. Radial head fractures affect all of these motions, especially the ability to rotate the forearm and hand.