Show Summary Details
Page of

The F Wave and the A Wave 

The F Wave and the A Wave
Chapter:
The F Wave and the A Wave
Author(s):

Jun Kimura

DOI:
10.1093/med/9780199738687.003.0007
Page of

PRINTED FROM OXFORD MEDICINE ONLINE (www.oxfordmedicine.com). © Oxford University Press, 2021. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a title in Oxford Medicine Online for personal use (for details see Privacy Policy and Legal Notice).

date: 20 September 2021

The F wave results from backfiring of antidromically activated anterior horn cells. Thus, it helps assess motor conduction along the entire length of the peripheral axons.Despite inherent variability of the latency and waveform, F wave usefully supplements the conventional nerve conduction studies in characterizing neuropathic disorders.In a diffuse process, F-wave latencies, reflecting accumulated conduction delay, often clearly exceed the normal range even in patients with a borderline abnormality.This chapter reviewsclinical values and imitation of F-wave studies and three types of A wave, ephaptic, ectopic, and collateral, which may also help identify a neuropathic process.

Access to the complete content on Oxford Medicine Online requires a subscription or purchase. Public users are able to search the site and view the abstracts for each book and chapter without a subscription.

Please subscribe or login to access full text content.

If you have purchased a print title that contains an access token, please see the token for information about how to register your code.

For questions on access or troubleshooting, please check our FAQs, and if you can't find the answer there, please contact us.