NOTE: The clinical examination for determining muscle and tendon status are described in the previous section.
Exclusion criteria: Neuromuscular blocking agents within past 3 days.
Criteria - both of the following:
(1) both clinical findings on 2 or more consecutive assessments
(2) electrophysiologic evidence of axonal polyneuropathy
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Clinical Finding
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Cooperative Patient
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Uncooperative Patient
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motor sumscore
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0 - 25 (< 26; out of 30)
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0 - 7 (< 8; out of 10)
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tendon reflexes
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decreased or absent
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decreased or absent
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Electrophysiologic findings:
(1) findings in ulnar nerve
(1a) distal compound muscle action potential (CMAP) absent or < 4.2 mV
(1b) no evidence of entrapment at the elbow
(1c) no evidence of demyelination (ratio of proximal CMAP area to distal CMAP area > 0.89)
(2) findings in peroneal nerve
(2a) distal compound muscle action potential (CMAP) absent or < 2.6 mV
(2b) no evidence of entrapment at the fibular head
(2c) no evidence of demyelination (ratio of proximal CMAP area to distal CMAP area > 0.89)
(3) spontaneous activity at rest (fibrillations and/or positive waves) in >= 2 examined muscles
Electrophysiologic criteria: 2 or more of the findings present (1 and 2, 1 and 3, 2 and 3)
