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The Journal of Neuroscience, November 2, 2005, 25(44):10101-10104; doi:10.1523/JNEUROSCI.2998-05.2005

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BRIEF COMMUNICATION
Neural Coupling Binds Visual Tokens to Moving Stimuli

Michael Rose and Christian Büchel

NeuroImage Nord, Department for Systems Neuroscience, University Medical Center Hamburg-Eppendorf, D-20246 Hamburg, Germany

Spatially separated visual objects that appear in alternating sequence can be perceived as a single moving object. This phenomenon of apparent motion enables us to perceive sequentially presented images as a motion picture. How does the visual system bind together single visual tokens to one moving object? Here we report a series of experiments investigating apparent motion with electroencephalographic recordings showing that gamma-band oscillatory coupling in the visual cortex is crucial for this phenomenon. We used an ambiguous stimulus that could be perceived as moving either vertically or horizontally. Because visual information from the right and left visual hemifields is routed to the contralateral early visual cortex, in the case of perceived horizontal movement, information from both hemispheres has to be integrated. In accord with this assumption, our data show stronger oscillatory coupling between right and left visual cortices during perception of horizontal motion compared with vertical motion.

Key words: perception; gamma band; binding; EEG; coherence; neural coupling

Received April 6, 2005; revised August 18, 2005; accepted September 9, 2005.




This article has been cited by other articles:


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 Cereb CortexHome page
M. Rose, T. Sommer, and C. Buchel
Integration of Local Features to a Global Percept by Neural Coupling
Cereb Cortex, October 1, 2006; 16(10): 1522 - 1528.
[Abstract] [Full Text] [PDF]


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