Analysis of temporal structure in sound by the human brain.

Details

Serval ID
serval:BIB_8EF7DC2D1CA1
Type
Article: article from journal or magazin.
Collection
Publications
Title
Analysis of temporal structure in sound by the human brain.
Journal
Nature Neuroscience
Author(s)
Griffiths T.D., Büchel C., Frackowiak R.S., Patterson R.D.
ISSN
1097-6256 (Print)
ISSN-L
1097-6256
Publication state
Published
Issued date
1998
Volume
1
Number
5
Pages
422-427
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Abstract
For over a century, models of pitch perception have been based on the frequency composition of the sound. Pitch phenomena can also be explained, however, in terms of the time structure, or temporal regularity, of sounds. To locate the mechanism for the detection of temporal regularity in humans, we used functional imaging and a 'delay-and-add' noise, which activates all frequency regions uniformly, like noise, but which nevertheless produces strong pitch perceptions and tuneful melodies. This stimulus has temporal regularity that can be systematically altered. We found that the activity of primary auditory cortex increased with the regularity of the sound. Moreover, a melody composed of delay-and-add 'notes' produced a distinct pattern of activation in two areas of the temporal lobe distinct from primary auditory cortex. These results suggest a hierarchical analysis of time structure in the human brain.
Keywords
Auditory Cortex/physiology, Humans, Music, Noise, Pitch Perception/physiology, Sound, Time Perception/physiology
Pubmed
Web of science
Create date
12/09/2011 20:51
Last modification date
20/08/2019 14:52
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