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Pre-stimulus brain rhythms in the alpha-band: Do they play a role in shaping perception?| old_uid | 7686 |
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| title | Pre-stimulus brain rhythms in the alpha-band: Do they play a role in shaping perception? |
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| start_date | 2009/11/25 |
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| schedule | 16h-17h |
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| online | no |
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| summary | Visual perception not only depends on the physical properties ofthe sensory stimulus but is shaped by the internal state of the brain priorto stimulus onset. In this talk, I will present some of my recent work, complemented by research from other groups, on inferring visual receptive states from pre-stimulus oscillatory EEG-activity and on its relevance for forthcoming perception. With an emphasis on the posterioralpha-oscillation (8-14Hz) and based on EEG and combined TMS/EEG-studies, I will present and discuss the extent to which EEG-/TMS-derived measures(oscillatory activity/cortical excitability) are linked, (co-)varyspontaneously over time, are amenable to endogenous (attention) or top-down control and correlate with or shape perception (correlationversus causation). These recent findings help to address the issue whether oscillatory activity is a correlate or substrate of brain function, and further characterize the posterior alpha oscillation in terms of its role in visual attention and perception, and in terms of its generation (cortical localization and cortico-cortical modulation). |
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| responsibles | Bishop |
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