Brachioradialis reflex

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Brachioradialis reflex

The brachioradialis reflex (also known as supinator reflex [1]) is observed during a

(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

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

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