radial reflex

radial reflex
flexion of the forearm (and sometimes also of the fingers) that occurs when the lower end of the radius is tapped. It is due to contraction of the brachioradialis muscle, which is stimulated by tapping its point of insertion in the radius.

* * *

flexion of the forearm, following tapping on the lower end of the radius; when the fingers flex as well, it indicates hyperreflexia.

Medical dictionary. 2011.

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