L5 radiculopathy with reduced superficial peroneal sensory responses: intraspinal and extraspinal causes

Muscle & Nerve
K H Levin

Abstract

Thirteen patients were retrospectively identified with the electrodiagnostic pattern of combined L5 radiculopathy by needle electrode examination, and abnormality of the superficial peroneal nerve (SPN) sensory nerve action potential (SNAP) amplitude. To have combined L5-derived sensory and motor axon loss, lesions must be localized at or distal to the L5 dorsal root ganglion (DRG), but also proximal to the sacral plexus. Six patients had evidence of an active intraspinal canal (ISC) lesion, 3 had diabetes, and 4 had nonspecific causes. The ISC localization in at least 6 of our cases is counter to the commonly held electrodiagnostic dogma that L5 radiculopathy spares the SPN SNAP, but recent anatomic studies confirm the ISC location of up to 40% of L5 DRG. Thus loss of the SPN SNAP does not exclude ISC lesions.

References

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Citations

Sep 27, 2015·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Chaojun ZhengRobert Weber
Sep 22, 2012·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·M MondelliF Sicurelli
Mar 1, 2012·Neurologic Clinics·Vera Fridman, William S David
Mar 1, 2012·Neurologic Clinics·Mark A Ferrante
Mar 1, 2012·Neurologic Clinics·Kerry H Levin
Mar 1, 2012·Neurologic Clinics·Rachel DiTrapani, Devon I Rubin
Apr 21, 2007·Neurologic Clinics·Bryan Tsao
Mar 1, 2013·Muscle & Nerve·Georgios ManousakisAlan Pestronk
Mar 18, 2000·Archives of Physical Medicine and Rehabilitation·W S Pease
Sep 5, 2002·Muscle & Nerve·Bashar KatirjiDavid C Preston
Jan 12, 1999·Muscle & Nerve·J K RichardsonB Riley
Jun 5, 2020·The Journal of Spinal Cord Medicine·Elia G MalekAchraf Makki
Oct 27, 2009·PM & R : the Journal of Injury, Function, and Rehabilitation·Kevin F Fitzpatrick
Mar 31, 2015·Journal of the American Podiatric Medical Association·Maria TzikaKonstantinos Natsis
Nov 28, 2012·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Muneharu AndoMunehito Yoshida
Mar 19, 2002·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Morris A Fisher

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