Electrodiagnostic evaluation of compressive nerve injuries of the upper extremities.

Electrodiagnostic testing includes electromyography and nerve conduction studies that are physiologic tests used in the diagnosis of peripheral nerve injuries. It is a supplement rather than a replacement for a physical examination. This article reviews the terminology as well as the findings seen and used in electrodiagnostic studies. Common compression nerve injuries including the median, ulnar, radial, axillary, and suprascapular nerves and their electrical findings are reviewed.