<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Dear Fieldtrip community,<div class=""><br class=""></div><div class="">I am currently analysing spike-LFP data using FT_SPIKETRIGGEREDSPECTRUM_STATS and a sliding window approach to calculate the pairwise phase consistency (PPC) between spikes and LFPs.</div><div class=""><br class=""></div><div class="">However, some of my single units have very low firing rates which leads to artefacts in my results. So I guess I have to either use an approach that doesn’t use sliding windows and/or only select single units based on a threshold of minimum spiking rate.</div><div class=""><br class=""></div><div style="text-align: left; text-indent: -20px;" class=""> Is there a suggested number of spikes to use for PPC calculation? <span style="text-indent: -20px;" class="">Womelsdorf et al.,</span> 2014, for example (Womelsdorf, T., Ardid, S., Everling, S., & Valiante, T. A. (2014). Burst firing synchronizes prefrontal and anterior cingulate cortex during attentional control. <i class="">Current Biology : CB</i>, <i class="">24</i>(22), 2613–2621. <a href="http://doi.org/10.1016/j.cub.2014.09.046" class="">http://doi.org/10.1016/j.cub.2014.09.046</a>) used only those PPC values that were calculated from more than 30 spikes. I guess they do that because PPC’s variance becomes reasonably small at this value. They don’t use a sliding window approach, so I guess I would need that number of spikes for each time bin?</div><div style="text-indent: -20px;" class=""><span style="text-indent: -20px;" class=""><br class=""></span></div><div style="text-indent: -20px;" class=""><span style="text-indent: -20px;" class=""><br class=""></span></div><div class="">Best wishes,</div><div class=""><br class=""></div><div class="">Daniel</div><div class=""><br class=""><div apple-content-edited="true" class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">--</div><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Daniel Hähnke</div><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">PhD student</div><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""></div><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Technische Universität München<br class="">Institute of Neuroscience<br class="">Translational NeuroCognition Laboratory<br class="">Biedersteiner Straße 29, Bau 601<br class="">80802 Munich</div><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Germany<br class=""><br class=""></div><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Email: <a href="mailto:daniel.haehnke@lrz.tum.de" class="">daniel.haehnke@lrz.tum.de</a></div><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Phone: +49 89 4140 3356<br class=""></div></div></div>
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