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Rising sound intensity : an intrinsic warning cue activating the amygdala

Bach, D. R. and Schächinger, H. and Neuhoff, J. G. and Esposito, F. and Di Salle, F. and Lehmann, C. and Herdener, M. and Scheffler, K. and Seifritz, E.. (2008) Rising sound intensity : an intrinsic warning cue activating the amygdala. Cerebral cortex, Vol. 18, H. 1. pp. 145-150.

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Official URL: http://edoc.unibas.ch/dok/A6004281

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Abstract

Human subjects overestimate the change of rising intensity sounds compared with falling intensity sounds. Rising sound intensity has therefore been proposed to be an intrinsic warning cue. In order to test this hypothesis, we presented rising, falling, and constant intensity sounds to healthy humans and gathered psychophysiological and behavioral responses. Brain activity was measured using event-related functional magnetic resonance imaging. We found that rising compared with falling sound intensity facilitates autonomic orienting reflex and phasic alertness to auditory targets. Rising intensity sounds produced neural activity in the amygdala, which was accompanied by activity in intraparietal sulcus, superior temporal sulcus, and temporal plane. Our results indicate that rising sound intensity is an elementary warning cue eliciting adaptive responses by recruiting attentional and physiological resources. Regions involved in cross-modal integration were activated by rising sound intensity, while the right-hemisphere phasic alertness network could not be supported by this study.
Faculties and Departments:03 Faculty of Medicine > Bereich Querschnittsfächer (Klinik) > Ehemalige Einheiten Querschnittsfächer (Klinik) > Radiologische Physik (Scheffler)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Querschnittsfächer (Klinik) > Ehemalige Einheiten Querschnittsfächer (Klinik) > Radiologische Physik (Scheffler)
UniBasel Contributors:Scheffler, Klaus
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Oxford University Press
ISSN:1047-3211
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:31 Jan 2014 09:49
Deposited On:31 Jan 2014 09:49

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