The Effect of Prism Adaptation on EEG-markers of Spatial Attention
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2014-08-28
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en
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Abstract
Prism adaptation to a leftward optical deviation has been considered as a method to
produce neglect-like symptoms in healthy subjects. There has been discussion whether
these effects can be explained by sensorimotor effects, influence on perception or attention.
Using EEG-recordings during a spatial attention task, this study compares ERPs
and alpha lateralization before prism adaptation and after prism adaptation in healthy
subjects. After prism adaptation there was a significant increase in alpha power, but it
is unsure if this is directly caused by prism adaptation. Collectively, the results did not
reliably confirm any effects on brain signals after prism adaptation, mainly due to low
sample size. With machine learning the EEG-markers are studied on single trial level
by comparing predictions based on classification using alpha with predictions based
on classification using ERPs. Both, but especially alpha, showed a classification rate
significantly better than chance.
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Faculteit der Sociale Wetenschappen