This is a screen shot of a patient during Slow Wave Sleep (stage N3). The high amplitude <a href="//commons.wikimedia.org/w/index.php?title=EEG&amp;action=edit&amp;redlink=1" class="new" title="EEG (page does not exist)">EEG</a> is highlighted in red. This screen shot represents a 30 second epoch (30 seconds of data).
<a href="https://en.wikipedia.org/wiki/User:MrSandman" class="extiw" title="en:User:MrSandman">en:User:MrSandman</a>
<span class="int-own-work" lang="en">Own work</span>