Volberg, Gregor and Kliegl, Katrin and Hansimayr, Simon and Greenlee, Mark W. (2009) EEG Alpha Oscillations in the Preparation for Global and Local Processing Predict Behavioral Performance. HUMAN BRAIN MAPPING, 30 (7). pp. 2173-2183. ISSN 1065-9471,
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Visual attention can be directed either to the global features of a display or to the local elements that make up the display. We investigated whether oscillatory brain responses to globally or locally directed cue stimuli predict behavioral performance in subsequent target processing. Induced alpha band (8-12 Hz) amplitudes in the pre-stimulus interval were measured separately for the global and the local level, where individual trials were assigned to one of three groups according to the response speed towards incongruent stimuli. Fast responses to local features were associated with high alpha amplitudes in the right centro-parietal cortex, whereas fast responses to global forms were associated with high alpha in left centro-parietal cortex. For trials with slower responses, the pattern of hemispheric differences was diminished or even reversed. It is interpreted that the left and the right parietal cortex exert top-down control over hierarchical processing by inhibiting stimulus representations in one hemisphere. Hum Brain Mapp 30:2173-2183, 2009. (C) 2008 Wiley-Liss, Inc.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VISUAL-SPATIAL ATTENTION; HEMISPHERIC-DIFFERENCES; OCCIPITAL CORTEX; STIMULUS POSITION; TASK; DESYNCHRONIZATION; INTEGRATION; INHIBITION; PRECEDENCE; MECHANISMS; alpha oscillations; attention; EEG; hierarchical processing |
| Subjects: | 100 Philosophy & psychology > 150 Psychology |
| Divisions: | Human Sciences > Institut für Psychologie > Lehrstuhl für Psychologie IV (Entwicklungs- und Kognitionspsychologie) - Prof. Dr. Karl-Heinz Bäuml Human Sciences > Institut für Psychologie > Lehrstuhl für Psychologie I (Allgemeine Psychologie I und Methodenlehre) - Prof. Dr. Mark W. Greenlee |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Sep 2020 04:55 |
| Last Modified: | 14 Sep 2020 04:55 |
| URI: | https://pred.uni-regensburg.de/id/eprint/28747 |
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