Citation

Mathes B, Pomper U, Walla P, Basar-Eroglu C. Neurosci. Lett. 2010; 478(1): 14-18.

Affiliation

Institute of Psychology and Cognition Research, University of Bremen, Grazer Str. 4, 28359 Bremen, Germany.

Copyright

(Copyright © 2010, Elsevier Publishing)

DOI

10.1016/j.neulet.2010.04.057

PMID

20435088

Abstract

Multistable visual perception refers to phenomena, in which one invariant stimulus pattern is perceived in at least two different, mutually exclusive ways. In this EEG study we differentiate between perceptual- and motor-related processes during perceptual reversals. Delta and alpha band activity was analyzed while participants answered to a perceptual reversal either immediately or with a delay of approximately 1500ms, thereby separating reversal-related and motor-related activity. On the single sweep level a reversal-related positive delta response and reversal-related desynchronisation of alpha activity could be detected irrespective of the motor response. Both conditions elicited the strongest reversal-related modulations at posterior locations. Contrary, motor-related responses were found predominantly at central locations. These findings were supported by a control experiment, using a slightly modified stimulus that allowed unambiguous perceptual changes to be triggered exogenously. In conclusion, this study demonstrates that the brain response to perceptual reversals differs from motor-related processes elicited by the button-press indicating the perceptual reversal. The results of this study, therefore, indicate that perceptual- and motor-related processes are achieved in multiple selectively distributed and parallel working oscillatory networks of the brain.

Language: en