Effect of Attention on Perceptual Echoes
| dc.contributor.advisor | Herring, Jim | |
| dc.contributor.author | Chota, Samson | |
| dc.date.issued | 2017-08-01 | |
| dc.description.abstract | VanRullen and Mcdonald investigated the impulse response function of the brain by cross-correlating random luminance sequences with the simultaneously recorded EEG data. Surprisingly the resulting impulse response function showed a strong and long lasting 10 Hz component, that showed increased power, as a result of high visual attention. In this MEG experiment, we aimed at investigating the effect of top-down attention on the alpha power of these so called perceptual echo functions, in a cross-modal attention task. Moreover, we were interested in investigating the relationship between ongoing alpha oscillations, perceptual echoes and gamma activity. We found increased alpha power in the perceptual echoes as a result of low visual attention. Furthermore, we were able to show increased posterior alpha power during random visual stimulation, and provide evidence for a phase locking of posterior gamma activity to alpha oscillations. Finally our findings suggest that bottom up visual processing of random visual sequences is reflected in the posterior gamma activity. | en_US |
| dc.embargo.lift | 2042-08-01 | |
| dc.embargo.type | Tijdelijk embargo | en_US |
| dc.identifier.uri | https://theses.ubn.ru.nl/handle/123456789/7474 | |
| dc.language.iso | en | en_US |
| dc.thesis.faculty | Faculteit der Sociale Wetenschappen | en_US |
| dc.thesis.specialisation | Researchmaster Cognitive Neuroscience | en_US |
| dc.thesis.studyprogramme | Researchmaster Cognitive Neuroscience | en_US |
| dc.thesis.type | Researchmaster | en_US |
| dc.title | Effect of Attention on Perceptual Echoes | en_US |