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Imaging cortical activity following affective stimulation with a hightemporal and spatial resolution

Imaging cortical activity following affective stimulation with a hightemporal and spatial resolution

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KEIL, Julian, Hannah ADENAUER, Claudia CATANI, Frank NEUNER, 2009. Imaging cortical activity following affective stimulation with a hightemporal and spatial resolution. In: BMC Neuroscience. 10(1), 83. eISSN 1471-2202. Available under: doi: 10.1186/1471-2202-10-83

@article{Keil2009Imagi-10729, title={Imaging cortical activity following affective stimulation with a hightemporal and spatial resolution}, year={2009}, doi={10.1186/1471-2202-10-83}, number={1}, volume={10}, journal={BMC Neuroscience}, author={Keil, Julian and Adenauer, Hannah and Catani, Claudia and Neuner, Frank}, note={This article is available from: http://www.biomedcentral.com/1471-2202/10/83 Article Number: 83} }

application/pdf Keil, Julian Adenauer, Hannah Catani, Claudia First publ. in: BMC Neuroscience 2009, 10:83 Adenauer, Hannah Neuner, Frank deposit-license Catani, Claudia Neuner, Frank eng 2011-03-25T09:21:36Z Background: The affective and motivational relevance of a stimulus has a distinct impact on cortical processing, particularly in sensory areas. However, the spatial and temporal dynamics of this affective modulation of brain activities remains unclear. The purpose of the present study was the development of a paradigm to investigate the affective modulation of cortical networks with a high temporal and spatial resolution. We assessed cortical activity with MEG using a visual steadystate paradigm with affective pictures. A combination of a complex demodulation procedure with a minimum norm estimation was applied to assess the temporal variation of the topography of cortical activity.<br />Results: Statistical permutation analyses of the results of the complex demodulation procedure revealed increased steady-state visual evoked field amplitudes over occipital areas following presentation of affective pictures compared to neutral pictures. This differentiation shifted in the time course from occipital regions to parietal and temporal regions.<br />Conclusion: It can be shown that stimulation with affective pictures leads to an enhanced activity in occipital region as compared to neutral pictures. However, the focus of differentiation is not stable over time but shifts into temporal and parietal regions within four seconds of stimulation. Thus, it can be crucial to carefully choose regions of interests and time intervals when analyzing the affective modulation of cortical activity. Imaging cortical activity following affective stimulation with a hightemporal and spatial resolution 2009 Keil, Julian 2011-03-25T09:21:36Z

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