#Trials frontier data cube locations windows#

No such patterns were found in the case of disambiguated cube variants.ĭiscussion: The identified EEG effects may reflect destabilized states of neural representations, related to destabilized perceptual states preceding a perceptual reversal.

The traces remained similar until approximately 1100 ms before a perceived reversal, became maximally different at around 890 ms ( p = 7.59 × 10 –6, Cohen’s d = 1.35) and remained different until shortly before offset of the stimulus preceding the reversal. Results: For the ambiguous Necker cube stimuli, we found the earliest differences in the EEG between reversal trials and stability trials already 1 s before a reversal occurred, at bilateral parietal electrodes.

#Trials frontier data cube locations windows#

We compared the EEG immediately before and during endogenous Necker cube reversals with corresponding time windows during exogenously induced perceptual reversals of disambiguated cube variants. In a separate experimental condition, disambiguated cube variants were alternated randomly, to exogenously induce perceptual reversals. Methods: We presented ambiguous Necker cube stimuli in an onset-paradigm and investigated the neural processes underlying endogenous reversals as compared to perceptual stability across two consecutive stimulus presentations. In the current study, we focused on possible Electroencephalogram (EEG) correlates of perceptual destabilization, that may allow prediction of an upcoming perceptual reversal. A number of theoretical approaches postulate destabilization of neural representations as a pre-condition for reversals of ambiguous figures. During passive observation, perceptual reversals seem to be sudden and spontaneous. Introduction: During observation of the ambiguous Necker cube, our perception suddenly reverses between two about equally possible 3D interpretations.

7Bernstein Center Freiburg, University of Freiburg, Freiburg, Germany.

6INSERM U1114, Cognitive Neuropsychology and Pathophysiology of Schizophrenia, Strasbourg, France.

5Department of Psychosomatic Medicine and Psychotherapy, Medical Center – University of Freiburg, Freiburg, Germany.

4Faculty of Biology, University of Freiburg, Freiburg, Germany.

3Institute for Frontier Areas of Psychology and Mental Health, Freiburg, Germany.

2Faculty of Medicine, University of Freiburg, Freiburg, Germany.

1Department of Psychiatry and Psychotherapy, Medical Center – University of Freiburg, Freiburg, Germany.

Mareike Wilson 1,2,3,4 Lukas Hecker 1,2,3,4,5 Ellen Joos 6 Ad Aertsen 4,7 Ludger Tebartz van Elst 1,2 Jürgen Kornmeier 1,2,3,4*