Journal
JOURNAL OF NEUROSCIENCE
Volume 34, Issue 19, Pages 6634-6639Publisher
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.4813-13.2014
Keywords
alpha; attention; auditory
Categories
Funding
- Labex Cortex of Universite de Lyon, within the program Investissements d'Avenir [ANR-11-LABX-0042]
- Deutsche Forschungsgemeinschaft [We4156/1-1]
- European Research Council [WIN2CON, ERC StG 283404]
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Despite substantial research on attentional modulations of visual alpha activity, doubts remain as to the existence and functional relevance of auditory cortical alpha-band oscillations. It has been argued that auditory cortical alpha does not exist, cannot be measured noninvasively, or that it is dependent on visual alpha generators. This study aimed to address these remaining doubts concerning auditory cortical alpha. A magnetoencephalography study was conducted using a combined audiovisual spatial cueing paradigm. In each trial, a cue indicated the side (left or right) and the modality (auditory or visual) to attend, followed by a short lateralized auditory or visual stimulus. Participants were instructed to respond to the stimuli by a button press. Results show that auditory cortical alpha power is selectively modulated by the audiospatial, but not the visuospatial, attention task. These findings provide further evidence for a distinct auditory cortical alpha generator, which can be measured noninvasively.
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