this video demonstrates the upper extremity reflex Examination for the biceps reflex the forearm should be supported by resting it on the patient's thighs the arm should be between flexion and extension Place one finger over the biceps tendon and tap briskly the forearm will Flex at the elbow for the bracho radialis reflex the arm should be flexed at the elbow and in the midrone position tap over the bracho radialis tendon at the wrist should observe flexion and supination of the forearm for the pronator Terry's reflex the arm should be supine tap over the pronator Terry's muscle you should observe pronation with this reflex observe the difference between the pronator Terry's reflex and the bracho radialis reflex carefully for the triceps reflex support the patient's arm in abduction and internal rotation tap briskly over the triceps tendon you should see extension of the arm for the finger jerk reflex place the patient's fingers in a semiflexed position and match them with your own tap briskly over your own fingers you should observe finger flexion with this reflex