Symmetry of normal motor and sensory nerve conduction measurements

Muscle & Nerve
M B Bromberg, L Jaros

Abstract

Nerve conduction measurements in normal subjects are assumed to be symmetric, but the normal limits of symmetry have not been determined. Full data on the limits of symmetry for commonly studied nerves are important in the clinical interpretation of nerve conduction data. We selected normal electrodiagnostic studies from archived electromyographic laboratory reports that included bilateral measurements of motor and sensory nerves. Symmetry of nerve conduction measures was confirmed, and only the median and ulnar sensory nerves had significant deviations from symmetry, supporting subclinical nerve damage in the most common dominant hand. The limits of symmetry were determined by calculating the 95th percentile for the differences between sides. For motor and sensory nerves, the range of 95th percentile limits was narrower for measures in upper extremity nerves compared to lower extremity nerves. Several reasons are offered for the wider limits of symmetry in lower extremity nerves.

References

Nov 1, 1984·Journal of the Neurological Sciences·P K Taylor
May 1, 1996·Archives of Physical Medicine and Rehabilitation·R A Werner, A Franzblau
Nov 18, 1997·Electroencephalography and Clinical Neurophysiology·M B Bromberg, T Spiegelberg

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Citations

Aug 19, 2004·Muscle & Nerve·J M ShefnerUNKNOWN Northeast ALS Consortium
Sep 6, 2008·Journal of Clinical Neuromuscular Disease·Yew-Long LoPavanni Ratnagopal
Nov 26, 1999·American Journal of Physical Medicine & Rehabilitation·R M Buschbacher
Mar 27, 2001·Muscle & Nerve·Z SimmonsJ M Shefner
Apr 28, 2017·Nature Reviews. Neurology·Michael P Collins, Robert D Hadden
Jan 27, 2019·Muscle & Nerve·Magdalena KoszewiczSlawomir Budrewicz
May 13, 2006·Muscle & Nerve·D E SticklerE W Massey
Jun 14, 2012·Journal of the International Neuropsychological Society : JINS·Robert P FellowsUNKNOWN Manhattan HIV Brain Bank
Oct 8, 2019·Muscle & Nerve·Theo MobachPierre R Bourque
Jun 1, 2002·Journal of Clinical Neuromuscular Disease·Mark B Bromberg, A Gordon Smith
Aug 3, 2002·Neurologic Clinics·David N Herrmann, Eric L Logigian

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