Schubert, Jonathan T W; Buchholz, Verena N; Focker, Julia; Engel, Andreas K; Röder, Brigitte; Heed, Tobias: Alpha-band oscillations reflect external spatial coding for tactile stimuli in sighted, but not in congenitally blind humans.. In: Scientific reports. Jg.9 H. 1. 2019
Inhalt
- Two views on post-stimulus alpha-band activity: pre-trial and pre-stimulus baselines.
- Figure 1 Experimental paradigm and behavioral results.
- Figure 2 Attention-related alpha-band power modulations (10–14 Hz) relative to pre-trial and pre-stimulus baselines for sighted and congenitally blind groups.
- Figure 3 Alpha-band power modulations in the sighted group.
- Sighted individuals: sensor analysis, induced activity.
- Sighted individuals: source analysis.
- Congenitally blind individuals: sensor analysis, total activity.
- Blind individuals: source analysis.
- Lack of effects of external spatial coding on beta-band activity.
- Discussion
- Figure 4 Induced alpha power (total power minus stimulus-locked power) of the sighted group.
- Figure 5 Alpha-band activity in the blind group.
- Figure 6 Beta-band activity of sighted and congenitally blind participants.
- Alpha-band activity implicates a wide-spread cortical network involved in tactile-spatial coding.
- Attention, but not posture, modulates touch-related alpha-band activity in congenitally blind individuals.
- Hemispheric balance of attention-related alpha-band modulation.
- Conclusion
- Methods
- Participants.
- Stimuli and procedure.
- Analysis of behavioral performance.
- Analysis of EEG data.
- Source reconstruction.
- Acknowledgements