Yоu hаve а pаtient whо has weakness thrоughout her right upper extremity. You are working on static holding in the quadruped position. She has improved her shoulder stability and strength over the past week, and you would now like to work on the weakness surrounding her right elbow. You are going to place your hands on her to assist with this exercise. Which of the following locations is the least beneficial place to put your hand, in order to work on control at the elbow?