Skip to main content Accessibility help

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.

Close cookie message
×
Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-23T22:38:50.278Z Has data issue: false hasContentIssue false

Chapter 13 - Normal Variants

from Part II - Interpretation

Published online by Cambridge University Press:  24 June 2021

Neville M. Jadeja
Neville M. Jadeja
Affiliation:
University of Massachusetts Medical School
Get access

Summary

Benign variants should be distinguished from epileptogenic and ictal patterns to prevent misdiagnosis of epilepsy. Variants are identified based on their appearance, typical location, state, and age group. Antiepileptic medications such as valproic acid or levetiracetam may blunt epileptic discharges and reduce their amplitude, making them less distinct from the surrounding background. These can be mistaken for normal variants.

Keywords

wicketssmall sharp spikes16 and 6 HzphantomsFARRMTDSREDAmidline thetaMu
Type
Chapter
Information
How to Read an EEG , pp. 98 - 118
Publisher: Cambridge University Press
Print publication year: 2021

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.)

References

Smith, D, Defalla, BA, Chadwick, DW. The misdiagnosis of epilepsy and the management of refractory epilepsy in a specialist clinic. QJM. 1999 Jan 1;92(1):15–23.Google Scholar
Aminoff, MJ. Electroencephalography: general principles and clinical applications. In Electrodiagnosis in clinical neurology, 6th ed.; Aminoff, MJ, Ed. (pp. 37–84). Elsevier, New York; 2012.Google Scholar
Krauss, GL, Abdallah, A, Lesser, R, Thompson, RE, Niedermeyer, E. Clinical and EEG features of patients with EEG wicket rhythms misdiagnosed with epilepsy. Neurology. 2005 Jun 14;64(11):1879–83.Google Scholar
Tatum, WO IV, Husain, AM, Benbadis, SR, et al. Normal adult EEG and patterns of uncertain significance. Journal of Clinical Neurophysiology. 2006;23(3):194–207.Google Scholar
Tatum, WO, DiCiaccio, B, Kipta, JA, Yelvington, KH, Stein, MA. The texting rhythm: a novel EEG waveform using smartphones. Journal of Clinical Neurophysiology. 2016 Aug 1;33(4):359–66.Google Scholar
Aird, RB, Gastaut, Y. Occipital and posterior electroencephalographic ryhthms. Electroencephalography and Clinical Neurophysiology. 1959 Nov 1;11(4):637–56.CrossRefGoogle Scholar
Van Cott, AC. Epilepsy and EEG in the elderly. Epilepsia. 2002 Mar; 43:94–102.Google Scholar
Libenson, MH, Caravale, B. Do antiepileptic drugs differ in suppressing interictal epileptiform activity in children? Pediatric Neurology. 2001 Mar 1;24(3):214–18.Google Scholar

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
×