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Europe PubMed Central
Other literature type . 2010
Data sources: PubMed Central
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Journal of Neuroscience
Article . 2010 . Peer-reviewed
License: CC BY NC SA
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https://doi.org/10.1523/JNEURO...
Article . 2010 . Peer-reviewed
Data sources: SNSF P3 Database
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A Temporal Hierarchy for Conspecific Vocalization Discrimination in Humans

Authors: De Lucia, M.; Clarke, S.; Murray, M.M.;

A Temporal Hierarchy for Conspecific Vocalization Discrimination in Humans

Abstract

The ability to discriminate conspecific vocalizations is observed across species and early during development. However, its neurophysiologic mechanism remains controversial, particularly regarding whether it involves specialized processes with dedicated neural machinery. We identified spatiotemporal brain mechanisms for conspecific vocalization discrimination in humans by applying electrical neuroimaging analyses to auditory evoked potentials (AEPs) in response to acoustically and psychophysically controlled nonverbal human and animal vocalizations as well as sounds of man-made objects. AEP strength modulations in the absence of topographic modulations are suggestive of statistically indistinguishable brain networks. First, responses were significantly stronger, but topographically indistinguishable to human versus animal vocalizations starting at 169–219 ms after stimulus onset and within regions of the right superior temporal sulcus and superior temporal gyrus. This effect correlated with another AEP strength modulation occurring at 291–357 ms that was localized within the left inferior prefrontal and precentral gyri. Temporally segregated and spatially distributed stages of vocalization discrimination are thus functionally coupled and demonstrate how conventional views of functional specialization must incorporate network dynamics. Second, vocalization discrimination is not subject to facilitated processing in time, but instead lags more general categorization by ∼100 ms, indicative of hierarchical processing during object discrimination. Third, although differences between human and animal vocalizations persisted when analyses were performed at a single-object level or extended to include additional (man-made) sound categories, at no latency were responses to human vocalizations stronger than those to all other categories. Vocalization discrimination transpires at times synchronous with that of face discrimination but is not functionally specialized.

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Microsoft Academic Graph classification: Sound Spectrography Stimulus (physiology) Electroencephalography Brain mapping Temporal lobe Superior temporal gyrus medicine Communication medicine.diagnostic_test business.industry Functional specialization Categorization business Psychology Neuroscience

Keywords

Adult, Male, Sound Spectrography, Time Factors, Neuropsychological Tests, Young Adult, Discrimination, Psychological, Species Specificity, Neural Pathways, Animals, Humans, Speech, Acoustic Stimulation; Adult; Animals; Auditory Perception/physiology; Brain/physiology; Brain Mapping; Discrimination (Psychology)/physiology; Electroencephalography; Evoked Potentials, Auditory; Female; Humans; Male; Neural Pathways/physiology; Neuropsychological Tests; Sound Spectrography; Species Specificity; Speech; Speech Perception/physiology; Time Factors; Vocalization, Animal; Young Adult, Brain Mapping, General Neuroscience, Brain, Electroencephalography, Articles, Acoustic Stimulation, Auditory Perception, Evoked Potentials, Auditory, Speech Perception, Female, Vocalization, Animal

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  • citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    82
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
82
Top 10%
Top 10%
Top 10%
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hybrid