These muscles are supported by the two forearm bones, the ulna and radius, which form a joint that rotates to let you turn the palm of your hand up or down. Two large arteries, also called the ...

The three bones involved in elbow flexion are the: humerus, in your upper arm ulna, on the little finger side of your forearm radius, on the thumb side of your forearm There are three muscles ...

The brachioradialis is a muscle in your forearms. It extends from the lower part of the humerus (the long bone in your upper arm) down to the radius (the long bone on thumb side of your forearm).