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Features versus Feelings: Dissociable Representations of the Acoustic Features and Valence of Aversive Sounds

Lookup NU author(s): Dr Sukhbinder Kumar, Dr Katherina von Kriegstein, Professor Tim Griffiths

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Abstract

This study addresses the neuronal representation of aversive sounds that are perceived as unpleasant. Functional magnetic resonance imaging in humans demonstrated responses in the amygdala and auditory cortex to aversive sounds. We show that the amygdala encodes both the acoustic features of a stimulus and its valence (perceived unpleasantness). Dynamic causal modeling of this system revealed that evoked responses to sounds are relayed to the amygdala via auditory cortex. While acoustic features modulate effective connectivity from auditory cortex to the amygdala, the valence modulates the effective connectivity from amygdala to the auditory cortex. These results support a complex (recurrent) interaction between the auditory cortex and amygdala based on object-level analysis in the auditory cortex that portends the assignment of emotional valence in amygdala that in turn influences the representation of salient information in auditory cortex.


Publication metadata

Author(s): Kumar S, von Kriegstein K, Friston K, Griffiths TD

Publication type: Article

Publication status: Published

Journal: Journal of Neuroscience

Year: 2012

Volume: 32

Issue: 41

Pages: 14184-14192

Print publication date: 10/10/2012

ISSN (print): 0270-6474

ISSN (electronic): 1529-2401

Publisher: Society for Neuroscience

URL: http://dx.doi.org/10.1523/JNEUROSCI.1759-12.2012

DOI: 10.1523/JNEUROSCI.1759-12.2012


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