Visually induced gamma-band activity predicts speed of change detection in humans
Publication year
2010Number of pages
6 p.
Source
NeuroImage, 51, 3, (2010), pp. 1162-1167ISSN
Publication type
Article / Letter to editor
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Organization
PI Group Neurobiology of Language
PI Group MR Techniques in Brain Function
Neurophysics
Cognitive Neuroscience
Former Organization
F.C. Donders Centre for Cognitive Neuroimaging
Journal title
NeuroImage
Volume
vol. 51
Issue
iss. 3
Languages used
English (eng)
Page start
p. 1162
Page end
p. 1167
Subject
120 000 Neuronal Coherence; 120 002 Attentional effects on corticomuscular and corticocortical coherence; 150 000 MR Techniques in Brain Function; Biophysics; DCN 1: Perception and ActionAbstract
Groups of activated neurons typically synchronize in the gamma-frequency band (30-100 Hz), and gamma-band synchronization has been implicated in numerous cognitive functions. Those functions are ultimately expressed as behavior and therefore, functional gamma-band synchronization should be directly related to behavior. We recorded the magnetoencephalogram in human subjects and used a visual stimulus to induce occipital gamma-band activity. We found that the strength of this gamma-band activity at a given moment predicted the speed with which the subject was able to report a change in the stimulus. This predictive effect was restricted in time, frequency and space: It started only around 200 ms before the behaviorally relevant stimulus change, was present only between 50 and 80 Hz, and was significant only in bilateral middle occipital gyrus, while the peak of overall visually induced gamma-band activity was found in the calcarine sulcus. These results suggest that visually induced gamma-band activity is functionally relevant for the efficient transmission of stimulus change information to brain regions issuing the corresponding motor response.
This item appears in the following Collection(s)
- Academic publications [245263]
- Donders Centre for Cognitive Neuroimaging [4022]
- Electronic publications [132514]
- Faculty of Medical Sciences [93208]
- Faculty of Science [37522]
- Open Access publications [106157]
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