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britzmichel_statedependentvisualprocessing_fihn_2011
Journal article

State-Dependent Visual Processing

PSPE

  • 2011
Published in:
  • Frontiers in Psychology. - Frontiers Media SA. - 2011, vol. 2
EEG microstates
state-dependent information processing
resting-state networks
ambiguous figures
binocular rivalry
English The temporal dynamics and anatomical correlates underlying human visual cognition are traditionally assessed as a function of stimulus properties and task demands. Any nonstimulus related activity is commonly dismissed as noise and eliminated to extract an evoked signal that is only a small fraction of the magnitude of the measured signal. We review studies that challenge this view by showing that non-stimulus related activity is not mere noise but that it has a well-structured organization which can largely determine the processing of upcoming stimuli. We review recent evidence from human electrophysiology that shows how different aspects of pre-stimulus activity such as pre-stimulus EEG frequency power and phase and pre-stimulus EEG microstates can determine qualitative and quantitative properties of both lower and higher-level visual processing. These studies show that low-level sensory processes depend on the momentary excitability of sensory cortices whereas perceptual processes leading to stimulus awareness depend on momentary pre-stimulus activity in higher-level non-visual brain areas. Also speed and accuracy of stimulus identification have likewise been shown to be modulated by pre-stimulus brain states.
Faculty
Faculté des lettres et des sciences humaines
Department
Département de Psychologie
Language
  • English
License
CC BY-NC
Open access status
gold
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/336077
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