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Home List of Titles Investigating evoked and induced electroencephalogram activity in task-related alpha power increases during an internally directed attention task
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/5283
- Investigating evoked and induced electroencephalogram activity in task-related alpha power increases during an internally directed attention task
- Cooper, Nicholas R.; Burgess, Adrian P.; Croft, Rodney J.; Gruzelier, John H.
- This study sought to explore whether the so-called 'paradoxical' task-related increases in the alpha bandwidth of the human electroencephalogram result from increases in evoked (phase locked), as opposed to induced (non-phase locked), activity. The electroencephalograms of 18 participants were recorded while they engaged in both auditory sensory-intake tasks (listening to randomly generated 'tunes') and internally directed attention tasks (imagining the same randomly generated tunes) matched for auditory input. Measures of evoked (phase locked) and induced (non-phase locked) activity were compared between tasks. Increases in induced ot power were found during internal attention. No experimental effects were observed for evoked activity. These results are not entirely consistent with proposals that 'paradoxical' alpha indexes the evoked inhibition of task irrelevant processing.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Life and Social Sciences. Brain Sciences Institute
- NeuroReport, Vol. 17, no. 2 (2006), p. 205-208
- Publication year
- Electroencephalogram; Induced activity; Internal attention; Mental imagery
- Lippincott Williams & Wilkins
- Publisher URL
- Copyright © 2006 Lippincott Williams & Wilkins.
- Peer reviewed