This information can lead the clinician to look to diagnoses other than peripheral neuropathy to explain the patient's symptoms (e.g., myelopathy). 10 For the purposes of this discussion, it can be assumed that normal sensory nerve action potentials mean that the cells of the dorsal root ganglion and the large myelinated axons are healthy, and that if the patient is having numbness, the pathologic process lies proximal to the dorsal root ganglion, or the patient has common small fiber or nociceptive neuropathy. Sensory nerve conduction testing is usually the starting point for neurophysiologic testing of a patient suspected to have peripheral neuropathy for confirming or excluding sensory nerve involvement. Waldman, in Pain Management, 2007 Sensory Nerve Conduction Testing
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