Alternative perceptual states 'apparent motion' and 'perceived simultaneity' lead to differences of induced EEG rhythms.
An investigation of the cortical response (EEG) to periodically presented stimuli producing an ambiguity between long-range apparent motion and flicker is reported. ERPs to stimulus onsets differed slightly between the two percepts, in accordance with the results of Manning et al. (1988), Selmes et al. (1997). Induced rhythms exhibited a strong increase in induced beta and gamma powers at electrode positions T7 and T8 during the perception of apparent motion in two out of 10 participants. In addition, a small overall increase in alpha power at 12-13 Hz and a decrease in delta power below 3.5 Hz during perceived motion were found. The results indicate that a variety of different neural rhythms are involved in the perception of long-range apparent motion.
Kompass
R
R
Department of Psychology, University Leipzig, Seeburgstr. 14-20, D-04103, Leipzig, Germany. kompass@rz.uni-leipzig.de
Hüfner
R
R
Schröger
E
E
Kaernbach
C
C
Geissler
H G
HG
D000328:Adult; D000465:Algorithms; D000513:Alpha Rhythm; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D010775:Photic Stimulation; D014796:Visual Perception / Q000502:physiology*