| Processing of spectral and amplitude envelope of animal vocalizations in the human auditory cortex. | |
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MedLine Citation:
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PMID: 20493891 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In daily life, we usually identify sounds effortlessly and efficiently. Two properties are particularly salient and of importance for sound identification: the sound's overall spectral envelope and its temporal amplitude envelope. In this study, we aimed at investigating the representation of these two features in the human auditory cortex by using a functional magnetic resonance imaging adaptation paradigm. We presented pairs of sound stimuli derived from animal vocalizations that preserved the time-averaged frequency spectrum of the animal vocalizations and the amplitude envelope. We presented the pairs in four different conditions: (a) pairs with the same amplitude envelope and mean spectral envelope, (b) same amplitude envelope, but different mean spectral envelope, (c) different amplitude envelope, but same mean spectral envelope and (d) both different amplitude envelope and mean spectral envelope. We found fMRI adaptation effects for both the mean spectral envelope and the amplitude envelope of animal vocalizations in overlapping cortical areas in the bilateral superior temporal gyrus posterior to Heschl's gyrus. Areas sensitive to the amplitude envelope extended further anteriorly along the lateral superior temporal gyrus in the left hemisphere, while areas sensitive to the spectral envelope extended further anteriorly along the right lateral superior temporal gyrus. Posterior tonotopic areas within the left superior temporal lobe displayed sensitivity for the mean spectrum. Our findings suggest involvement of primary auditory areas in the representation of spectral cues and encoding of general spectro-temporal features of natural sounds in non-primary posterior and lateral superior temporal cortex. |
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Authors:
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Christian F Altmann; Cícero Gomes de Oliveira Júnior; Linda Heinemann; Jochen Kaiser |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-05-21 |
Journal Detail:
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Title: Neuropsychologia Volume: 48 ISSN: 1873-3514 ISO Abbreviation: Neuropsychologia Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-02 Completed Date: 2010-11-22 Revised Date: 2011-03-03 |
Medline Journal Info:
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Nlm Unique ID: 0020713 Medline TA: Neuropsychologia Country: England |
Other Details:
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Languages: eng Pagination: 2824-32 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Institute of Medical Psychology, Goethe University, Frankfurt am Main, Germany. c.altmann@kt5.ecs.kyoto-u.ac.jp |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation
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methods Adolescent Adult Animals Auditory Cortex / blood supply, physiology* Auditory Perception / physiology* Brain Mapping* Female Functional Laterality / physiology Humans Image Processing, Computer-Assisted / methods Magnetic Resonance Imaging Male Oxygen / blood Sound Spectrum Analysis / methods* Vocalization, Animal* Young Adult |
| Chemical | |
Reg. No./Substance:
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7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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