What are sensory nerve conduction studies?

Updated: Aug 20, 2018
  • Author: Stephen Kishner, MD, MHA; Chief Editor: Jonathan P Miller, MD  more...
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Sensory nerve conduction studies are performed via stimulation of a nerve (ie, sufficient to produce an action potential) at one point and measurement of the action potential at another point along the course of the nerve. [5] Peripheral sensory nerves can be used to localize a lesion in relation to the dorsal root ganglion that contains the cell body of the nerve, allowing differentiation of preganglionic disorders (eg, radiculopathies, cauda equina lesions, posterior column disease) from postganglionic disorders (eg, neuropathies, plexopathies). With a preganglionic lesion, the sensory nerve action potential is normal (although clinically abnormal) because axonal transport from the cell body to the peripheral axon remains intact. [6]

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