Sensitivity to the temporal structure of rapid sound sequences - An MEG study

Lefkothea-Vasiliki Andreou; Timothy D Griffiths; Maria Chait

doi:10.1016/j.neuroimage.2015.01.052

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Sensitivity to the temporal structure of rapid sound sequences - An MEG study

Journal article

Open access

Peer reviewed

Sensitivity to the temporal structure of rapid sound sequences - An MEG study

Lefkothea-Vasiliki Andreou, Timothy D Griffiths and Maria Chait

NeuroImage (Orlando, Fla.), Vol.110, pp.194-204

04/15/2015

DOI: 10.1016/j.neuroimage.2015.01.052

PMCID: PMC4389832

PMID: 25659464

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https://doi.org/10.1016/j.neuroimage.2015.01.052View

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Abstract

To probe sensitivity to the time structure of ongoing sound sequences, we measured MEG responses, in human listeners, to the offset of long tone-pip sequences containing various forms of temporal regularity. If listeners learn sequence temporal properties and form expectancies about the arrival time of an upcoming tone, sequence offset should be detectable as soon as an expected tone fails to arrive. Therefore, latencies of offset responses are indicative of the extent to which the temporal pattern has been acquired. In Exp1, sequences were isochronous with tone inter-onset-interval (IOI) set to 75, 125 or 225ms. Exp2 comprised of non-isochronous, temporally regular sequences, comprised of the IOIs above. Exp3 used the same sequences as Exp2 but listeners were required to monitor them for occasional frequency deviants. Analysis of the latency of offset responses revealed that the temporal structure of (even rather simple) regular sequences is not learnt precisely when the sequences are ignored. Pattern coding, supported by a network of temporal, parietal and frontal sources, improved considerably when the signals were made behaviourally pertinent. Thus, contrary to what might be expected in the context of an 'early warning system' framework, learning of temporal structure is not automatic, but affected by the signal's behavioural relevance.

Acoustic Stimulation

Adult

Attention - physiology

Auditory Cortex - physiology

Auditory Perception - physiology

Brain Mapping

Evoked Potentials, Auditory

Female

Functional Laterality - physiology

Humans

Image Processing, Computer-Assisted

Magnetoencephalography - methods

Male

Time Perception - physiology

Young Adult

Details

Title: Subtitle: Sensitivity to the temporal structure of rapid sound sequences - An MEG study
Creators: Lefkothea-Vasiliki Andreou - University College London
Timothy D Griffiths - Newcastle University
Maria Chait - University College London
Resource Type: Journal article
Publication Details: NeuroImage (Orlando, Fla.), Vol.110, pp.194-204
DOI: 10.1016/j.neuroimage.2015.01.052
PMID: 25659464
PMCID: PMC4389832
ISSN: 1053-8119
eISSN: 1095-9572
Grant note: 091593 / Wellcome Trust 093292/Z/10/Z / Wellcome Trust 091681 / Wellcome Trust
Language: English
Date published: 04/15/2015
Academic Unit: Psychological and Brain Sciences
Record Identifier: 9984627341702771

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