Abstract：
: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.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Hoogenboom N,Schoffelen JM,Oostenveld R,Fries Pdoi
10.1016/j.neuroimage.2010.03.041subject
Has Abstractpub_date
2010-07-01 00:00:00pages
1162-7issue
3eissn
1053-8119issn
1095-9572pii
S1053-8119(10)00328-9journal_volume
51pub_type
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