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Standardized methods are, however, necessary to obtain their valid application in different laboratories for the purpose of collection of normative data, comparison of patient data and organization of multi\u2010center studies. It is proposed that in patients with suspected \u201clower motor neuron\u201d type lesions concentric needle electromyography (CNEMG) is the most informative test to detect pelvic floor denervation\/reinnervation, and the external anal sphincter (EAS) muscle is the most appropriate muscle to be examined (either in isolation\u2014when a selective lesion is suspected\u2014or in addition to examination of other muscles). An algorithm consisting of standardized tests including a standardized approach to CNEMG examination of the EAS is presented. The proposed electrophysiologic assessment consists of a computer\u2010assisted analysis of denervation and reinnervation features of the CNEMG signal, a qualitative assessment of reflex and voluntary activation of EAS motor units, and of electrical (or mechanical) elicitation of the bulbocavernosus reflex in those patients in whom manual anogenital stimulation failed to elicit a robust response in the EAS. The proposed protocol could serve as a basis for further studies on validity, sensitivity and specificity of electrophysiologic assessment in patients with different types of \u201clower motor neuron\u201d involvement of pelvic floor muscles and sacral dysfunction. Neurourol. Urodynam. 20:669\u2013682, 2001. \u00a9 2001 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/nau.1018","type":"journal-article","created":{"date-parts":[[2002,8,25]],"date-time":"2002-08-25T19:52:11Z","timestamp":1030305131000},"page":"669-682","source":"Crossref","is-referenced-by-count":76,"title":["Protocol for clinical neurophysiologic examination of the pelvic floor"],"prefix":"10.1002","volume":"20","author":[{"given":"Simon","family":"Podnar","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David 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