De Vries, I. E. J., Marinato, G., & Baldauf, D. (2021). Decoding Object-Based Auditory Attention from Source-Reconstructed MEG Alpha Oscillations. The Journal of Neuroscience, 41(41), 8603–8617. https://doi.org/10.1523/JNEUROSCI.0583-21.2021
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De Vries & Baldauf (2021) - Journal of Neuroscience
results
- in naturalistic scenes it is impossible to dissociate relevant from irrelevant information based on low-level feature
- this task could not be solved by attending low-level features, but only by processing the objects fully.
- We thus demonstrate anticipatory alpha oscillations to underlie top-down control of object-based auditory attention in complex naturalistic scenes.
- delta-to-theta (i.e., 2–8 Hz) oscillations in auditory cortex track slow acoustic fluctu- ations (i.e., the temporal envelope) of speech (i.e., entrainment or phase-locking
- subjects who were better prepared (i.e., attended better to the correct stream right before the repetition, as indicated by higher alpha classification accuracy) responded faster to the repetition. We did not observe such an effect for accuracy (Rho = 0.26, p = 0.35). Albeit speculative, these two results suggest a causal role for os- cillatory alpha activity in object-based auditory attention since significant alpha classification earlier during the trial predicted subsequent behavioral performance.
lateralization
- prospective cues indicating lat- eralized auditory targets result in alpha lateralization in auditory and parietal cortices
- We hypothesized an- ticipatory alpha oscillations, indexing top-down attentional control, to be timely related to the subsequent identification of the repeated auditory object.
see also
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Created: 2025-11-12 22:12