The clinical examination of the radial nerve should comprise tests of:
If the radial nerve is affected below the upper third of the upper arm then: - brachioradialis and the extensor muscles are affected - the patient will have a wrist drop which can be demonstrated by the patient's inability to extend the wrist when his elbow is flexed and his forearm pronated.
If a lesion is affects the radial nerve above the upper third of the upper arm then: - function of triceps - extension of the elbow - is also affected.
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