Veniero, D., Gross, J., Morand, S., Duecker, F., Sack, A. T., & Thut, G. (2021). Top-down control of visual cortex by the frontal eye fields through oscillatory realignment. Nature Communications, 12(1), 1757. https://doi.org/10.1038/s41467-021-21979-7
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Veniero (2021) - Nature Comm.
abstract
- FEF activation leads to cyclic modulation of visual perception and extrastriate but not primary visual cortex excitability, again at beta frequency.
- We conclude that top-down signals originating in FEF causally shape visual cortex activity and perception through mechanisms of oscillatory realignment.
results
- The results indicate the presence of true oscillatory episodes at frequencies between 12 and 20 Hz over each posterior electrode of interest in the 300 ms following FEF activation, as compared to the sham control
- FEF activation causes periodic fluctuation in the perception of motion stimuli.
- We found significant phase consistency across participants for the lower range of the beta-frequency bins again in both time windows, […] No other frequency showed phase consistency
- emulated, attentional top-down control signals by brief FEF stimulation do not only phase-reset oscillatory activity in the beta-band but also caused visual performance to cycle at the same frequency.
- FEF activation causes periodic fluctuations in V5 excitability.
- FEF activation causally shapes V5 excitability through a phase reset of beta-activity.
- In contrast to our findings, these previous studies have provided evidence of an attentional sampling at slower frequencies in the theta- to alpha-bands
- The lack of effects on V1 supports previous evidence from electrophysiological and imaging studies of a downstream progression of attentional effects59 revealing that feedback signals are first sent to higher-order visual areas, such as V5, before being retransmitted to earlier areas, such as V1
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Created: 2025-11-15 16:38