Volume 21, Issue 3 pp. 298-308

Root stimulation improves the detection of acquired demyelinating polyneuropathies

Daniel L. Menkes MD

Corresponding Author

Daniel L. Menkes MD

Department of Neurology, University of Louisville, 500 South Preston Street, Louisville, Kentucky 40292, USA

Department of Neurology, University of Louisville, 500 South Preston Street, Louisville, Kentucky 40292,USASearch for more papers by this author
Daniel C. Hood MD

Daniel C. Hood MD

Section of Neurology, Department of Medicine, 60th MDOS/SGOMU, David Grant USAF Medical Center, 101 Bodin Circle, Travis AFB California 94535-5300, USA

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Roderick A. Ballesteros R EDT

Roderick A. Ballesteros R EDT

Section of Neurology, Department of Medicine, 60th MDOS/SGOMU, David Grant USAF Medical Center, 101 Bodin Circle, Travis AFB California 94535-5300, USA

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David A. Williams MD

David A. Williams MD

Section of Neurology, Department of Medicine, 60th MDOS/SGOMU, David Grant USAF Medical Center, 101 Bodin Circle, Travis AFB California 94535-5300, USA

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Abstract

Thirty-one patients with a presentation compatible with an acquired demyelinating polyradiculoneuropathy were prospectively e avaluated for proximal conduction block using root stimulation (RS) of cervical and/or lumbar roots. These same techniques were applied to 78 controls (40 pathological). Proximal conduction block was noted in 20/31 cases and none of the controls. Only 7 of 31 cases met published demyelinating criteria. Intravenous immune globulin therapy was completed by 21/31 patients and 20/21 responded. RS is superior to published electrophysiologic criteria for identifying demyelinating polyneuropathies and predicting who will respond to treatment. RS should be performed in all patients suspected of having an acquired demyelinating polyneuropathy when traditional nerve conduction studies criteria are nondiagnostic. RS reliably predicts those likely to respond to immunosuppressive therapy. © 1998 John Wiley & Sons, Inc. Muscle Nerve 21:298–308, 1998.

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