Electrical impedance myography in the diagnosis of radiculopathy

We sought to determine whether elec- trical impedance myography (EIM) could serve as a diagnostic procedure for evaluation of radiculopathy. Methods: Twenty- seven patients with clinically and radiologically diagnosed cervi- cal or lumbosacral radiculopathy who met a “gold standard” defi- nition underwent EIM and standard needle electromyography (EMG) of multiple upper or lower extremity muscles. Results: EIM reactance values revealed consistent reductions in the radic- ulopathy-affected myotomal muscles as compared with those on the unaffected side; the degree of asymmetry was associated strongly with the degree of EMG abnormality (P