Abstract
The neurobiological correlates of human fluid intelligence (Gf) remain elusive. Here, we demonstrate that spatiotemporal dynamics of EEG activity correlate with baseline measures of Gf and with its modulation by cognitive training. EEG dynamics were assessed in 74 healthy participants by examination of fast-changing, recurring, topographically-defined electric patterns termed “microstates”, which characterize the electrophysiological activity of distributed cortical networks. We find that the frequency of appearance of specific brain topographies, spatially associated with visual (microstate B) and executive control (microstate C) networks, respectively, is inversely related to Gf scores. Moreover, changes in Gf scores with cognitive training are inversely correlated with changes in microstate properties, indicating that the changes in brain network dynamics are behaviorally relevant. Finally, we find that cognitive training that increases Gf scores results in a posterior shift in the topography of microstate C. These results highlight the role of fast-changing brain electrical states in individual variability in Gf and in the response to cognitive training.
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This research is based upon work supported by the Office of the Director of National Intelligence (ODNI), Intelligence Advanced Research Projects Activity (IARPA), via 2014-13121700007. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the ODNI, IARPA, or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Governmental purposes notwithstanding any copyright annotation thereon. Dr. Pascual-Leone is further supported by the Berenson-Allen Foundation, the Sidney R. Baer Jr. Foundation, grants from the National Institutes of Health (R01HD069776, R01NS073601, R21 MH099196, R21 NS082870, R21 NS085491, R21 HD07616), and Harvard Catalyst | The Harvard Clinical and Translational Science Center (NCRR and the NCATS NIH, UL1 RR025758). The content of this paper is solely the responsibility of the authors and does not necessarily represent the official views of Harvard Catalyst, Harvard University and its affiliated academic health care centers, the National Institutes of Health, the Sidney R. Baer Jr. Foundation. The authors would like to thank the members of the larger Honeywell SHARP team for their valuable contributions to this work, including the SHARP Team authors: Harvard Medical School (Ann Connor, Franziska Plessow, Sadhvi Saxena, Erica Levenbaum); Honeywell (Jessamy Almquist, Michael Dillard, Umut Orhan, Santosh Mathan); Northeastern University (James McKanna, Deniz Erdogmus, Misha Pavel); Oxford University (Anna-Katharine Brem, Roi Cohen Kadosh, Nick Yeung); SimCoach Games (Garrett Kimball, Eben Myers).
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Emiliano Santarnecchi and Arjun R. Khanna contributed equally to this work.
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Santarnecchi, E., Khanna, A.R., Musaeus, C.S. et al. EEG Microstate Correlates of Fluid Intelligence and Response to Cognitive Training. Brain Topogr 30, 502–520 (2017). https://doi.org/10.1007/s10548-017-0565-z
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DOI: https://doi.org/10.1007/s10548-017-0565-z