Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2010 Apr 16;133(5):1380–1390. doi: 10.1093/brain/awq070

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2010. Published by Oxford University Press on behalf of Brain.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

PMC Copyright notice

Ictal HFA. (A) Typical seizure activity observed in tetanus toxin model of epilepsy: example of a seizure with ‘hypersynchronous’ onset. (B) Seizure onset occurs suddenly and is characterized by bilateral synchronous slow discharges that were first recorded in ipsilateral CA3 and propagated to ipsilateral CA1 and to the contralateral hippocampus. The HFA superimposed on this discharge was initially 440 Hz and later decreased to 270 Hz. HFA was also present in contralateral CA1. (C) HFA observed during ictal discharges. (D) Comparison of first spectral moment of ictal onset HFA between ipsi- and contralateral hippocampus. (E) Regional values of the first spectral moments. (F) Fast ripple (FR)/ripple (R) power ratio at ictal onset in the two hippocampi. (G) Regional differences of the ratios of fast ripples/ripples. Significance values are *P < 0.05, **P < 0.01, ***P < 0.001. Only raw data are shown.