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Motion direction biases and decoding in human visual cortex.

Content Provider	Semantic Scholar
Author	Wang, Helena X. Merriam, Elisha P. Freeman, Jeremy Heeger, David J.
Copyright Year	2014
Abstract	Functional magnetic resonance imaging (fMRI) studies have relied on multivariate analysis methods to decode visual motion direction from measurements of cortical activity. Above-chance decoding has been commonly used to infer the motion-selective response properties of the underlying neural populations. Moreover, patterns of reliable response biases across voxels that underlie decoding have been interpreted to reflect maps of functional architecture. Using fMRI, we identified a direction-selective response bias in human visual cortex that: (1) predicted motion-decoding accuracy; (2) depended on the shape of the stimulus aperture rather than the absolute direction of motion, such that response amplitudes gradually decreased with distance from the stimulus aperture edge corresponding to motion origin; and 3) was present in V1, V2, V3, but not evident in MT+, explaining the higher motion-decoding accuracies reported previously in early visual cortex. These results demonstrate that fMRI-based motion decoding has little or no dependence on the underlying functional organization of motion selectivity.
File Format	PDF HTM / HTML
DOI	10.1523/JNEUROSCI.1034-14.2014
PubMed reference number	25209297
Journal	Medline
Volume Number	34
Issue Number	37
Alternate Webpage(s)	http://wexler.free.fr/library/files/wang%20(2014)%20motion%20direction%20biases%20and%20decoding%20in%20human%20visual%20cortex.pdf
Alternate Webpage(s)	http://clm.utexas.edu/compjclub/papers/Wang2014.pdf
Alternate Webpage(s)	http://www.cns.nyu.edu/labs/heegerlab/content/publications/Wang-JNeurosci2014-suppl.pdf
Alternate Webpage(s)	http://www.cns.nyu.edu/labs/heegerlab/content/publications/Wang-JNeurosci2014.pdf
Alternate Webpage(s)	http://www.cns.nyu.edu/heegerlab/content/publications/Wang-JNeurosci2014.pdf
Alternate Webpage(s)	https://doi.org/10.1523/JNEUROSCI.1034-14.2014
Journal	The Journal of neuroscience : the official journal of the Society for Neuroscience
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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