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Chapter 12 - Nerve Conduction Studies: Normal

Published online by Cambridge University Press:  14 September 2023

John A. Jarratt
Affiliation:
Emeritus, Sheffield Teaching Hospitals NHS Foundation Trust
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Summary

The separate techniques of motor nerve studies and sensory or mixed nerve studies are further explained with the aid of diagrams. The simple calculations of sensory and motor conduction velocities are described. Because the motor nerve tapers distally where it becomes unmyelinated and terminates in a neuromuscular junction, measurement of motor conduction velocity requires stimulation at two sites. This also provides an additional measurement, the distal latency. The effect on the amplitude and form of recorded potentials, particularly sensory ones, on conduction distance is discussed and illustrated with clinical examples. The pitfalls of submaximal stimulation are underlined in further clinical examples.

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Publisher: Cambridge University Press
Print publication year: 2023

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  • Nerve Conduction Studies: Normal
  • John A. Jarratt, Emeritus, Sheffield Teaching Hospitals NHS Foundation Trust
  • Book: Essential Electromyography
  • Online publication: 14 September 2023
  • Chapter DOI: https://doi.org/10.1017/9781009381055.013
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  • Nerve Conduction Studies: Normal
  • John A. Jarratt, Emeritus, Sheffield Teaching Hospitals NHS Foundation Trust
  • Book: Essential Electromyography
  • Online publication: 14 September 2023
  • Chapter DOI: https://doi.org/10.1017/9781009381055.013
Available formats
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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Nerve Conduction Studies: Normal
  • John A. Jarratt, Emeritus, Sheffield Teaching Hospitals NHS Foundation Trust
  • Book: Essential Electromyography
  • Online publication: 14 September 2023
  • Chapter DOI: https://doi.org/10.1017/9781009381055.013
Available formats
×