Publication year
2015Author(s)
Number of pages
12 p.
Source
Neuron, 85, 2, (2015), pp. 390-401ISSN
Publication type
Article / Letter to editor

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Organization
PI Group Neurobiology of Language
PI Group MR Techniques in Brain Function
Biophysics
Journal title
Neuron
Volume
vol. 85
Issue
iss. 2
Languages used
English (eng)
Page start
p. 390
Page end
p. 401
Subject
110 000 Neurocognition of Language; 120 000 Neuronal Coherence; 150 000 MR Techniques in Brain Function; 150 031 Building connectomes with MEG; BiophysicsAbstract
Visual cortical areas subserve cognitive functions by interacting in both feedforward and feedback directions. While feedforward influences convey sensory signals, feedback influences modulate feedforward signaling according to the current behavioral context. We investigated whether these interareal influences are subserved differentially by rhythmic synchronization. We correlated frequency-specific directed influences among 28 pairs of visual areas with anatomical metrics of the feedforward or feedback character of the respective interareal projections. This revealed that in the primate visual system, feedforward influences are carried by theta-band (~4 Hz) and gamma-band (~60-80 Hz) synchronization, and feedback influences by beta-band (~14-18 Hz) synchronization. The functional directed influences constrain a functional hierarchy similar to the anatomical hierarchy, but exhibiting task-dependent dynamic changes in particular with regard to the hierarchical positions of frontal areas. Our results demonstrate that feedforward and feedback signaling use distinct frequency channels, suggesting that they subserve differential communication requirements.
This item appears in the following Collection(s)
- Academic publications [202801]
- Donders Centre for Cognitive Neuroimaging [3354]
- Faculty of Science [31860]
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