AAEM Minimonograph 32: The electrodiagnostic examination in patients with radiculopathies


  • Asa J. Wilbourn MD,

    Corresponding author
    1. EMG Laboratory Desk 91, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, Ohio 44106, USA
    • American Association of Electrodiagnostic Medicine, 421 First Avenue SW, Suite 300 East, Rochester, MN 55902, USA
    Search for more papers by this author
  • Michael J. Aminoff MD, FRCP

    1. Department of Neurology, University of California, 505 Parnassus Avenue, San Francisco, California 94143-0114, USA
    Search for more papers by this author


The anatomy and pathophysiology of radiculopathies are reviewed, and the electrodiagnostic approaches used in evaluating patients with suspected root lesions are discussed. Such electrophysiologic procedures include motor and sensory nerve conduction studies, late-response studies, somatosensory and motor evoked potentials, nerve root stimulation, and needle electromyography. The value and limitations of these different procedures are considered. At the present time, needle electromyography is the single most useful approach. The findings in patients with radiculopathies at different levels are summarized. Muscle Nerve 21: 1612–1631, 1998