The perception of Necker cube reversal interacts with the Bereitschaftspotential.
Subjects observed a reversible figure (Necker cube), and were asked to switch a lever about twice a minute. The direction of the lever switch indicated whether a reversal of the Necker cube was just experienced or not experienced. The Bereitschaftspotential (BP, readiness potential) turned out to be smaller in amplitude but earlier in onset prior to the reversal, especially over fronto-central regions. During another condition a tonic background stimulation (achieved by a radio-play) was introduced. Distraction reduced the BP, mainly when no reversal was reported. The results suggest a dependency of pre-movement potentials from non-motoric, psychological variables.
D000328:Adult; D001288:Attention / Q000502:physiology; D001921:Brain / Q000502:physiology*; D004569:Electroencephalography; D004576:Electromyography; D005133:Eye Movements; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008297:Male; D009132:Muscles / Q000502:physiology; D009903:Optical Illusions / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*