Neural basis of stable perception of an ambiguous apparent motion stimulus

Neuroscience
Yoshiki KaneokeI Murakami

Abstract

Although it has been shown that an alternative dominant percept induced by an ambiguous visual scene has neural correlates in various cortical areas, it is not known how such a dominant percept is maintained until it switches to another. We measured the primary visual response to the two-frame bistable apparent motion stimulus (stroboscopic alternative motion) when observers continuously perceived one motion and compared this with the response for another motion using magnetoencephalography. We observed a response component at around 160 ms after the frame change, the amplitude of which depended on the perceived motion. In contrast, brain responses to less ambiguous and physically unambiguous motions in both the horizontal and vertical directions did not evoke such a component. The differential response evoked by the bistable apparent motion is therefore distinct from directionally-selective visual responses. The results indicate the existence of neural activity related to establish and maintain one dominant percept, the magnitude of which is related to the ambiguity of the stimulus. This is in the line with the currently proposed idea that dominant percept is established in the distributed cortical areas including the early vi...Continue Reading

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Citations

Dec 15, 2010·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Tomokazu UrakawaRyusuke Kakigi
Aug 26, 2014·Frontiers in Human Neuroscience·Gray D Davidson, Michael A Pitts
Jul 1, 2017·Human Brain Mapping·João Valente DuarteMiguel Castelo-Branco

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