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Frequency preference and attention effects across cortical depths in the human primary auditory cortex

Columnar arrangements of neurons with similar preference have been suggested as the fundamental processing units of the cerebral cortex. Within these columnar arrangements, feed-forward information enters at middle cortical layers whereas feedback information arrives at superficial and deep layers.... Full description

Journal Title: Proceedings of the National Academy of Sciences 29 December 2015, Vol.112(52), p.16036
Main Author: Federico De Martino
Other Authors: Michelle Moerel , Kamil Ugurbil , Rainer Goebel , Essa Yacoub , Elia Formisano
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0027-8424 ; E-ISSN: 1091-6490 ; DOI: 10.1073/pnas.1507552112
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recordid: pnas_s112_52_16036
title: Frequency preference and attention effects across cortical depths in the human primary auditory cortex
format: Article
creator:
  • Federico De Martino
  • Michelle Moerel
  • Kamil Ugurbil
  • Rainer Goebel
  • Essa Yacoub
  • Elia Formisano
subjects:
  • Sciences (General)
ispartof: Proceedings of the National Academy of Sciences, 29 December 2015, Vol.112(52), p.16036
description: Columnar arrangements of neurons with similar preference have been suggested as the fundamental processing units of the cerebral cortex. Within these columnar arrangements, feed-forward information enters at middle cortical layers whereas feedback information arrives at superficial and deep layers. This interplay of feed-forward and feedback processing is at the core of perception and behavior. Here we provide in vivo evidence consistent with a columnar organization of the processing of sound frequency in the human auditory cortex. We measure submillimeter functional responses to sound frequency sweeps at high magnetic fields (7 tesla) and show that frequency preference is stable through cortical depth in primary auditory cortex. Furthermore, we demonstrate that--in this highly columnar cortex--task demands sharpen the frequency tuning in superficial cortical layers more than in middle or deep layers. These findings are pivotal to understanding mechanisms of neural information processing and flow during the active perception of sounds. columns | tonotopy | fMRI | 7-Tesla | depth-dependent
language: eng
source:
identifier: ISSN: 0027-8424 ; E-ISSN: 1091-6490 ; DOI: 10.1073/pnas.1507552112
fulltext: fulltext_linktorsrc
issn:
  • 0027-8424
  • 00278424
  • 1091-6490
  • 10916490
url: Link


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descriptionColumnar arrangements of neurons with similar preference have been suggested as the fundamental processing units of the cerebral cortex. Within these columnar arrangements, feed-forward information enters at middle cortical layers whereas feedback information arrives at superficial and deep layers. This interplay of feed-forward and feedback processing is at the core of perception and behavior. Here we provide in vivo evidence consistent with a columnar organization of the processing of sound frequency in the human auditory cortex. We measure submillimeter functional responses to sound frequency sweeps at high magnetic fields (7 tesla) and show that frequency preference is stable through cortical depth in primary auditory cortex. Furthermore, we demonstrate that--in this highly columnar cortex--task demands sharpen the frequency tuning in superficial cortical layers more than in middle or deep layers. These findings are pivotal to understanding mechanisms of neural information processing and flow during the active perception of sounds. columns | tonotopy | fMRI | 7-Tesla | depth-dependent
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