期刊
CEREBRAL CORTEX
卷 18, 期 12, 页码 2902-2908出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bhn049
关键词
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资金
- German Research Foundation [SFB 550, TP A2, A7]
- Hertie Foundation
Attention improves visual discrimination and consequently allows to discern stimuli with low signal-to-noise ratios that otherwise would remain undetected. We used magnetoencephalography (MEG) to test whether neuromagnetic responses recorded from occipito-temporal cortex, reflecting the size of visual motion signals embedded in noise (motion coherence), would mirror the perceptual changes induced by attention. Attention directed to a given hemifield increased and decreased the coherence modulation of the MEG response over contralateral and ipsilateral visual cortex, respectively, indicating a change in the neuronal signal-to-noise ratio at the population level.
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