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

. 2015 May 18;9:21. doi: 10.3389/fncir.2015.00021

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

Copyright © 2015 Keller, Draguhn, Both and Reichinnek.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PMC Copyright notice

Electrically evoked sharp wave-ripple complexes (SPW-R) closely resemble spontaneous events. (A,B) Example traces of spontaneous (left) and evoked (right) SPW-R in CA1 (A) and CA3 (B), respectively. Evoked SPW-R show the same features like spontaneous SPW-R in different frequency bands corresponding to the sharp wave (low pass), ripple oscillations (band pass) and multi-unit activity (high pass). (C) Individual SPW-R waveforms (left) were analyzed by principal component analysis (PCA) and their similarity was quantified in the first 10 dimensions of the principal component (PC) space (middle, only two PCs are shown). Red dots indicate individual evoked SPW-R shown on the left panel, gray dots indicate spontaneous SPW-R. A smaller inter-group pair-wise average distance indicates more similar waveforms. To compare evoked and spontaneous events we quantified the overlap of events (right, see Methods).