Upper limb hyperreflexia Biceps hyperreflexia 2020-10-11T14:38:36Z Increased intensity of the biceps reflex. To test the biceps reflex, the examinar should support the forearm of the patient, e.g., by placing it on the forearm of the examiner. The arm is midway between flexion and extension. The examiner places a thumb firmly over the biceps tendon, with the fingers curling around the elbow, and taps briskly. With a normal response, the forearm will flex at the elbow.