Abstract：
:Necker cube is one of the ambiguous figures that is physically a static image but can be alternately perceived in two different perspectives. A great deal of debate exists regarding ambiguous figures that induce spontaneous switching between rival percepts. To investigate the time course of neural processes underlying such perceptual rivalry, we recorded electroencephalograms associated with participants' perceptions of a Necker cube under ambiguous and unambiguous conditions, using a modified discontinuous-presentation method. Each condition consisted of two stimuli presented consecutively, starting with an unambiguous stimulus in both conditions. The second stimulus was either ambiguous (ambiguous condition) or unambiguous (control condition). We compared endogenous reversal activity of ambiguous stimuli with exogenous reversals. As a result, we found that the right-occipital beta-band activity (16-26 Hz) increased 100-150 ms and 350-450 ms after the onset of the ambiguous stimulus only when the perception of the ambiguous stimulus differed from that of the first stimulus. These results indicate that activity in the right-occipital total beta band reflects endogenous switching between rivaling percepts.
journal_name
Neurosciencejournal_title
Neuroscienceauthors
Yokota Y,Minami T,Naruse Y,Nakauchi Sdoi
10.1016/j.neuroscience.2014.04.015subject
Has Abstractpub_date
2014-06-20 00:00:00pages
35-44eissn
0306-4522issn
1873-7544pii
S0306-4522(14)00310-8journal_volume
271pub_type
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