Brachioradialis Reflex
Expected findings - Palpable and visible contraction of the brachioradialis muscle with slight elbow flexion, as well as equivalent brachioradialis muscle reactivity when compared to the contralateral extremity
Equipment - Non-latex Taylor (i.e., tomahawk style hammer) or neurological reflex hammer
Testing procedures
- The forearm and elbow region should be visible and the proximal arm must be free of restrictive clothing (i.e., a tightly rolled up shirt sleeve).
- Stand in front and to the side of the extremity to be examined.
- With the patient seated, allow the patient's arm to rest in his or her lap.
- Localize the brachioradialis tendon.
- The brachioradialis muscle is typically relaxed, but reinforcement procedures can be used if needed.
- Allow the reflex hammer to swing loosely between your thumb and forefinger through a 45 to 60 degree arc.
- Strike the radial side of the forearm about 8 to 10 cm above the wrist with the base or apex of the reflex hammer running perpendicular to the muscle fibers.
- Standardize the size of the reflex hammer and force if needed.
- Palpate and visually observe the response to the provided stimulus (i.e., slight elbow flexion).
- Repeat the procedure.
- Document your findings.
