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We used whole\u2010head magnetoencephalography to pinpoint the magnetic counterparts of these effects in young healthy adults and explore their evolution over time. On each trial, participants bet on one of two visually presented numbers (25 or 5) by button\u2010press. Both numbers changed color: if the chosen number turned green (red), it indicated a gain (loss) of the corresponding sum in Euro cent. For losses, we found the magnetic correlate of the FRN extending between 230 and 465 ms. Source localization with low\u2010resolution electromagnetic tomography indicated a first generator in posterior cingulate cortex with subsequent activity in the anterior cingulate cortex. Importantly, this effect was sensitive to the magnitude of the monetary loss (25 cent &gt; 5 cent). Later activation was also found in the right insula. Time\u2010frequency analysis revealed a number of oscillatory components in the theta, alpha, and high\u2010beta\/low\u2010gamma bands associated to gains, and in the high\u2010beta band, associated to the magnitude of the loss. All together, these effects provide a more fine\u2010grained picture of the temporal dynamics of the processing of monetary rewards and losses in the brain. <jats:italic>Hum Brain Mapp, 2011<\/jats:italic>. \u00a9 2011 Wiley Periodicals, Inc.<\/jats:p>","DOI":"10.1002\/hbm.21184","type":"journal-article","created":{"date-parts":[[2011,2,9]],"date-time":"2011-02-09T11:49:11Z","timestamp":1297252151000},"page":"2228-2240","source":"Crossref","is-referenced-by-count":71,"title":["Temporal dynamics of reward processing revealed by magnetoencephalography"],"prefix":"10.1002","volume":"32","author":[{"given":"Nuria","family":"Do\u00f1amayor","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Josep","family":"Marco\u2010Pallar\u00e9s","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcus","family":"Heldmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. 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