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Activity in Human Auditory Cortex Represents Spatial Separation Between Concurrent Sounds.

The primary and posterior auditory cortex (AC) are known for their sensitivity to spatial information, but how this information is processed is not yet understood. AC that is sensitive to spatial manipulations is also modulated by the number of auditory streams present in a scene (Smith et al., 2010... Full description

Journal Title: The Journal of neuroscience : the official journal of the Society for Neuroscience May 23, 2018, Vol.38(21), pp.4977-4984
Main Author: Shiell, Martha M
Other Authors: Hausfeld, Lars , Formisano, Elia
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1529-2401 ; DOI: 10.1523/JNEUROSCI.3323-17.2018
Link: http://search.proquest.com/docview/2033380453/?pq-origsite=primo
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recordid: proquest2033380453
title: Activity in Human Auditory Cortex Represents Spatial Separation Between Concurrent Sounds.
format: Article
creator:
  • Shiell, Martha M
  • Hausfeld, Lars
  • Formisano, Elia
subjects:
  • Acoustic Stimulation–Diagnostic Imaging
  • Adult–Physiology
  • Auditory Cortex–Physiology
  • Auditory Perception–Physiology
  • Brain Mapping–Physiology
  • Computer Simulation–Physiology
  • Female–Physiology
  • Humans–Physiology
  • Magnetic Resonance Imaging–Physiology
  • Male–Physiology
  • Sound Localization–Physiology
  • Space Perception–Physiology
  • Support Vector Machine–Physiology
  • Auditory Cortex
  • Auditory Scene Analysis
  • Fmri
  • Multivariate Pattern Analysis
  • Spatial Cognition
ispartof: The Journal of neuroscience : the official journal of the Society for Neuroscience, May 23, 2018, Vol.38(21), pp.4977-4984
description: The primary and posterior auditory cortex (AC) are known for their sensitivity to spatial information, but how this information is processed is not yet understood. AC that is sensitive to spatial manipulations is also modulated by the number of auditory streams present in a scene (Smith et al., 2010), suggesting that spatial and nonspatial cues are integrated for stream segregation. We reasoned that, if this is the case, then it is the distance between sounds rather than their absolute positions that is essential. To test this hypothesis, we measured human brain activity in response to spatially separated concurrent sounds with fMRI at 7 tesla in five men and five women. Stimuli were spatialized amplitude-modulated broadband noises recorded for each participant via in-ear microphones before scanning. Using a linear support vector machine classifier, we investigated whether sound location and/or location plus spatial separation between sounds could be decoded from the activity in Heschl's gyrus and the planum temporale. The classifier was successful only when comparing patterns associated with the conditions that had the largest difference in perceptual spatial separation. Our pattern of results suggests that the representation of spatial separation is not merely the combination of single locations, but rather is an independent feature of the auditory scene.
language: eng
source:
identifier: E-ISSN: 1529-2401 ; DOI: 10.1523/JNEUROSCI.3323-17.2018
fulltext: fulltext
issn:
  • 15292401
  • 1529-2401
url: Link


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subjectAcoustic Stimulation–Diagnostic Imaging ; Adult–Physiology ; Auditory Cortex–Physiology ; Auditory Perception–Physiology ; Brain Mapping–Physiology ; Computer Simulation–Physiology ; Female–Physiology ; Humans–Physiology ; Magnetic Resonance Imaging–Physiology ; Male–Physiology ; Sound Localization–Physiology ; Space Perception–Physiology ; Support Vector Machine–Physiology ; Auditory Cortex ; Auditory Scene Analysis ; Fmri ; Multivariate Pattern Analysis ; Spatial Cognition
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descriptionThe primary and posterior auditory cortex (AC) are known for their sensitivity to spatial information, but how this information is processed is not yet understood. AC that is sensitive to spatial manipulations is also modulated by the number of auditory streams present in a scene (Smith et al., 2010), suggesting that spatial and nonspatial cues are integrated for stream segregation. We reasoned that, if this is the case, then it is the distance between sounds rather than their absolute positions that is essential. To test this hypothesis, we measured human brain activity in response to spatially separated concurrent sounds with fMRI at 7 tesla in five men and five women. Stimuli were spatialized amplitude-modulated broadband noises recorded for each participant via in-ear microphones before scanning. Using a linear support vector machine classifier, we investigated whether sound location and/or location plus spatial separation between sounds could be decoded from the activity in Heschl's gyrus and the planum temporale. The classifier was successful only when comparing patterns associated with the conditions that had the largest difference in perceptual spatial separation. Our pattern of results suggests that the representation of spatial separation is not merely the combination of single locations, but rather is an independent feature of the auditory scene.
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