Jul 25, 1997 · Loyola University Medical Education Network. Screening Physical Exam. Author: Arcot J. Chandrasekhar, MD, FRCP, FACP, FCCP Patient should be relaxed and positioned symmetrically, preferably lying supine. Biceps reflex: (C5-C6) With the arm gently flexed at the elbow, tap the biceps tendon with a reflex hammer. It may help to locate this tendon with your thumb, and strike your own thumb with the hammer.