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Processing of emotional words measured simultaneously with steady-state visually evoked potentials and near-infrared diffusing-wave spectroscopy

Processing of emotional words measured simultaneously with steady-state visually evoked potentials and near-infrared diffusing-wave spectroscopy

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KOBAN, Leonie, Markus NINCK, Jun LI, Thomas GISLER, Johanna KISSLER, 2010. Processing of emotional words measured simultaneously with steady-state visually evoked potentials and near-infrared diffusing-wave spectroscopy. In: BMC Neuroscience. 11, 85

@article{Koban2010Proce-13347, title={Processing of emotional words measured simultaneously with steady-state visually evoked potentials and near-infrared diffusing-wave spectroscopy}, year={2010}, doi={10.1186/1471-2202-11-85}, volume={11}, journal={BMC Neuroscience}, author={Koban, Leonie and Ninck, Markus and Li, Jun and Gisler, Thomas and Kißler, Johanna}, note={Article Number: 85} }

Ninck, Markus Gisler, Thomas deposit-license eng First publ. in: BMC Neuroscience 11 (2010), 85 Ninck, Markus Li, Jun 2010 Kißler, Johanna Gisler, Thomas Li, Jun 2011-05-18T07:39:35Z Background: Emotional stimuli are preferentially processed compared to neutral ones. Measuring the magnetic resonance blood-oxygen level dependent (BOLD) response or EEG event-related potentials, this has also been demonstrated for emotional versus neutral words. However, it is currently unclear whether emotion effects in word processing can also be detected with other measures such as EEG steady-state visual evoked potentials (SSVEPs) or optical brain imaging techniques. In the present study, we simultaneously performed SSVEP measurements and nearinfrared diffusing-wave spectroscopy (DWS), a new optical technique for the non-invasive measurement of brain function, to measure brain responses to neutral, pleasant, and unpleasant nouns flickering at a frequency of 7.5 Hz.<br />Results: The power of the SSVEP signal was significantly modulated by the words’ emotional content at occipital electrodes, showing reduced SSVEP power during stimulation with pleasant compared to neutral nouns. By contrast, the DWS signal measured over the visual cortex showed significant differences between stimulation with flickering words and baseline periods, but no modulation in response to the words’ emotional significance.<br />Conclusions: This study is the first investigation of brain responses to emotional words using simultaneous<br />measurements of SSVEPs and DWS. Emotional modulation of word processing was detected with EEG SSVEPs, but not by DWS. SSVEP power for emotional, specifically pleasant, compared to neutral words was reduced, which contrasts with previous results obtained when presenting emotional pictures. This appears to reflect processing differences between symbolic and pictorial emotional stimuli. While pictures prompt sustained perceptual<br />processing, decoding the significance of emotional words requires more internal associative processing. Reasons for an absence of emotion effects in the DWS signal are discussed. Koban, Leonie 2011-05-18T07:39:35Z Koban, Leonie Processing of emotional words measured simultaneously with steady-state visually evoked potentials and near-infrared diffusing-wave spectroscopy Kißler, Johanna

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

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