Brachioradialis reflex

The brachioradialis reflex (also known as supinator reflex [1]) is observed during a neurological exam by striking the brachioradialis tendon (at its insertion at the base of the wrist into the radial styloid process (radial side of wrist around 4 inches proximal to base of thumb)) directly with a reflex hammer when the patient's arm is relaxing. This reflex is carried by the radial nerve (spinal level: C5, C6)

The reflex should cause slight pronation or supination^[1] and slight elbow flexion. Contrary to popular belief, this reflex should not cause wrist extension and/or radial deviation, because the brachioradialis does not cross the wrist.

References

^ Springhouse (1 July 2007). Neurologic Care. Lippincott Williams & Wilkins. pp. 60–. ISBN 978-1-58255-706-9. Retrieved 4 July 2011.

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[Springhouse2007-1] Springhouse (1 July 2007). Neurologic Care. Lippincott Williams & Wilkins. pp. 60–. ISBN 978-1-58255-706-9. Retrieved 4 July 2011.

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v t e Reflexes
Cranial nerve	Pupillary light reflex Accommodation reflex Jaw jerk reflex Corneal reflex Caloric reflex test/Vestibulo-ocular reflex/Oculocephalic reflex Pharyngeal (gag) reflex
Stretch reflexes	Arm Biceps reflex Brachioradialis reflex Triceps reflex Leg Patellar reflex Ankle jerk reflex Plantar reflex
Primitive reflexes	Galant Gastrocolic Grasp Moro Rooting Stepping Sucking Tonic neck Parachute
Superficial reflexes	Abdominal reflex Cremasteric reflex
Cardiovascular	Bainbridge reflex Bezold–Jarisch reflex Coronary reflex Cushing reflex Diving reflex Oculocardiac reflex Baroreflex Reflex bradycardia Reflex tachycardia Respiratory Churchill–Cope reflex
Other	List of reflexes Acoustic reflex H-reflex Golgi tendon reflex Optokinetic Startle response Withdrawal reflex Crossed extensor reflex Symmetrical tonic neck reflex Scratch reflex Escape reflex Escape response Avoidance response Knismesis and gargalesis Ideomotor reflex