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Peroneal nerve repetitive nerve stimulation test: Its value in diagnosis of myasthenia gravis and Lambert–Eaton myasthenic syndrome
Author(s) -
Oh Shin J.,
Head Thomas,
Fesenmeier James,
Claussen Gwendolyn
Publication year - 1995
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.880180811
Subject(s) - repetitive nerve stimulation , neuromuscular transmission , myasthenia gravis , medicine , stimulation , nerve stimulation , common peroneal nerve , anatomy , tibialis anterior muscle , radial nerve , lambert eaton myasthenic syndrome , anesthesia , skeletal muscle
Abstract We have developed a repetitive nerve stimulation (RNS) technique for the peroneal nerve. Normal limits for the decremental responses for the anterior tibialis and extensor digitorum brevis muscles are 6–21% at the low rate of stimulation and 44–70% at the high rate of stimulation. These values exceed the normal limits for other commonly tested muscles. This may be due to the lower safety factor for neuromuscular transmission for the anterior tibialis and extensor digitorum brevis muscles. We present 4 cases in which the peroneal nerve RNS test was crucial for the diagnosis of the limb‐girdle form of MG or LEMS. Thus, we conclude that, in a small number of patients with neuromuscular transmission disorders, the peroneal nerve RNS test is needed for confirmation of disease. © 1995 John Wiley & Sons, Inc.