http://www.nitrc.org/forum/forum.php?forum_id=6111 <table border="0" width="100%"><tr><td align="left"/></tr></table> <p><b>Spurious correlations in simultaneous EEG-fMRI driven by in-scanner movement.</b></p> <p>Neuroimage. 2016 Mar 21;</p> <p>Authors: Fellner MC, Volberg G, Mullinger KJ, Goldhacker M, Wimber M, Greenlee MW, Hanslmayr S</p> <p>Abstract<br/> Simultaneous EEG-fMRI provides an increasingly attractive research tool to investigate cognitive processes with high temporal and spatial resolution. However, artifacts in EEG data introduced by the MR-scanner still remain a major obstacle. This study employing commonly used artifact correction steps shows that head motion, one overlooked major source of artifacts in EEG-fMRI data, can cause plausible EEG effects and EEG-BOLD correlations. Specifically, low frequency EEG (&lt;20Hz) is strongly correlated with in-scanner movement. Accordingly, minor head motion (&lt;0.2mm) induces spurious effects in a twofold manner: Small differences in task-correlated motion elicit spurious low frequency effects, and, as motion concurrently influences fMRI data, EEG-BOLD correlations closely match motion-fMRI correlations. We demonstrate these effects in a memory encoding experiment showing that obtained theta power (~3-7Hz) effects and channel-level theta-BOLD correlations reflect motion in the scanner. These findings highlight an important caveat that needs to be addressed by future EEG-fMRI studies.<br/> </p><p>PMID: 27012498 [PubMed - as supplied by publisher]</p> en-us Copyright 2000-2026 NITRC OSI Mon, 04 May 2026 14:59:03 GMT http://blogs.law.harvard.edu/tech/rss NITRC RSS generator