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Representations of specific acoustic patterns in the auditory cortex and hippocampus
Journal article   Open access

Representations of specific acoustic patterns in the auditory cortex and hippocampus

Sukhbinder Kumar, Heidi M. Bonnici, Sundeep Teki, Trevor R. Agus, Daniel Pressnitzer, Eleanor A. Maguire and Timothy D. Griffiths
Proceedings of the Royal Society. B, Biological sciences, Vol.281(1791), pp.20141000-20141000
09/22/2014
DOI: 10.1098/rspb.2014.1000
PMCID: PMC4132675
PMID: 25100695
url
https://doi.org/10.1098/rspb.2014.1000View
Published (Version of record) Open Access

Abstract

Previous behavioural studies have shown that repeated presentation of a randomly chosen acoustic pattern leads to the unsupervised learning of some of its specific acoustic features. The objective of our study was to determine the neural substrate for the representation of freshly learnt acoustic patterns. Subjects first performed a behavioural task that resulted in the incidental learning of three different noise-like acoustic patterns. During subsequent high-resolution functional magnetic resonance imaging scanning, subjects were then exposed again to these three learnt patterns and to others that had not been learned. Multi-voxel pattern analysis was used to test if the learnt acoustic patterns could be 'decoded' from the patterns of activity in the auditory cortex and medial temporal lobe. We found that activity in planum temporale and the hippocampus reliably distinguished between the learnt acoustic patterns. Our results demonstrate that these structures are involved in the neural representation of specific acoustic patterns after they have been learnt.
 Biology Ecology Environmental Sciences & Ecology Evolutionary Biology Life Sciences & Biomedicine Life Sciences & Biomedicine - Other Topics Science & Technology

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