Skip to main content Accessibility help
×
Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-27T20:41:59.205Z Has data issue: false hasContentIssue false

Chapter 13 - Nerve Conduction Studies: Degeneration

Published online by Cambridge University Press:  14 September 2023

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

Summary

Nerve conduction velocity in degenerative disease depends on which nerve fibres are affected. If the largest diameter ones are spared, velocity will be normal. Otherwise, there will be a decrease of up to 30 per cent. The localising value of nerve conduction studies in degenerative disease is limited though hardly required after focal trauma. Electromyography will usually also be needed. An abnormal finding will always be found if either the stimulating or recording electrode lies over a region of degeneration. Preganglionic pathology occurring in radiculopathies is associated with normal sensory conduction. The degree to which sensory nerve action potentials (SNAPs) are reduced in amplitude is a useful guide to the severity of the pathology within postganglionic fibres. These concepts are illustrated with simple but helpful diagrams.

Type
Chapter
Information
Publisher: Cambridge University Press
Print publication year: 2023

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Save book to Kindle

To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

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 Dropbox.

Available formats
×

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.

Available formats
×