<div dir="ltr">Hi Tim,<div><br></div><div>Those may be due to wire tugs, possibly as a result of the subject making (abrupt) movements (of the head). Logically, they are artifacts and need to be dealt with. Hopefully, someone here has found a way to do so effectively.</div><div><br></div><div>Best,</div><div>Arjen</div></div><div class="gmail_extra"><br><div class="gmail_quote">2017-04-07 11:32 GMT-07:00 Tim Meehan <span dir="ltr"><<a href="mailto:timeehan@gmail.com" target="_blank">timeehan@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Dear FieldTrippers,<div><br></div><div>I have a recurring artifact in my iEEG data, a very brief (10-15 ms) square-wave-like 'notch' that occurs intermittently and across many channels. It also varies in polarity and amplitude, seemingly randomly. Here's a link showing an example trial containing many of these artifacts:</div><div><br></div><div><a href="https://drive.google.com/open?id=0B4m5PGO25j3mYkVPUEI5aDZERDA" target="_blank">https://drive.google.com/open?<wbr>id=<wbr>0B4m5PGO25j3mYkVPUEI5aDZERDA</a><br></div><div><br></div><div>As of now I've been advised to throw out trials in which these occur, but they are very frequent during some sessions. I wonder if alternatively there is some way to selectively remove these? My guess is one could do some sort of template matching to identify when they occur and interpolate across, but I have no idea how to do that or if it's feasible. Does anyone have any insight?</div><div><br></div><div>Thank you,</div><div>Tim</div></div>
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