Overath, T;
Cusack, R;
Kumar, S;
von Kriegstein, K;
Warren, JD;
Grube, M;
Carlyon, RP;
(2007)
An information theoretic characterisation of auditory encoding.
PLoS Biol
, 5
(11)
, Article e288. 10.1371/journal.pbio.0050288.
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Abstract
The entropy metric derived from information theory provides a means to quantify the amount of information transmitted in acoustic streams like speech or music. By systematically varying the entropy of pitch sequences, we sought brain areas where neural activity and energetic demands increase as a function of entropy. Such a relationship is predicted to occur in an efficient encoding mechanism that uses less computational resource when less information is present in the signal: we specifically tested the hypothesis that such a relationship is present in the planum temporale (PT). In two convergent functional MRI studies, we demonstrated this relationship in PT for encoding, while furthermore showing that a distributed fronto-parietal network for retrieval of acoustic information is independent of entropy. The results establish PT as an efficient neural engine that demands less computational resource to encode redundant signals than those with high information content.
| Type: | Article |
|---|---|
| Title: | An information theoretic characterisation of auditory encoding. |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1371/journal.pbio.0050288 |
| Publisher version: | http://dx.doi.org/10.1371/journal.pbio.0050288 |
| Language: | English |
| Additional information: | © 2007 Overath et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| Keywords: | Acoustic Stimulation, Adolescent, Adult, Auditory Cortex, Auditory Pathways, Brain Mapping, Entropy, Female, Humans, Information Theory, Magnetic Resonance Imaging, Pitch Perception |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Neurodegenerative Diseases |
| URI: | https://discovery.ucl.ac.uk/id/eprint/46030 |
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