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Visual Field Maps, Population Receptive Field Sizes, and Visual Field Coverage in the Human MT+ Complex

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Amano, Kaoru, Wandell, Brian A., Dumoulin, Serge O.·2009·Journal of Neurophysiology

Abstract

Human neuroimaging experiments typically localize motion-selective cortex (MT+) by contrasting responses to stationary and moving stimuli. It has long been suspected that MT+, located on the lateral surface at the temporal–occipital (TO) boundary, contains several distinct visual field maps, although only one coarse map has been measured. Using a novel functional MRI model–based method we identified two maps—TO-1 and TO-2—and measured population receptive field (pRF) sizes within these maps. The angular representation of the first map, TO-1, has a lower vertical meridian on its posterior side at the boundary with the lateral–occipital cortex (i.e., the LO-2 portion). The angular representation continues through horizontal to the upper vertical meridian at the boundary with the second map, TO-2. The TO-2 angle map reverses from upper to lower visual field at increasingly anterior positions. The TO maps share a parallel eccentricity map in which center-to-periphery is represented in the ventral-to-dorsal direction; both maps have an expanded foveal representation. There is a progressive increase in the pRF size from V1/2/3 to LO-1/2 and TO-1/2, with the largest pRF sizes in TO-2. Further, within each map the pRF size increases as a function of eccentricity. The visual field coverage of both maps extends into the ipsilateral visual field, with larger sensitivity to peripheral ipsilateral stimuli in TO-2 than that in TO-1. The TO maps provide a functional segmentation of human motion-sensitive cortex that enables a more complete characterization of processing in human motion-selective cortex.

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Metadata

Authors
Amano, K., Wandell, B. A., & Dumoulin, S. O.
Venue
Journal of Neurophysiology
Published
2009-11
Volume
102
Issue
5
Pages
2704-2718
ISSN
  • 0022-3077 (ISSN-L)
  • 1522-1598
OpenAlex
W2065193615
Cited by
342
References
68
FWCI
7.16
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Visual Field Maps, Population Receptive Field Sizes, and Visual Field Coverage in the Human MT+ Complex. https://app.cochat.ai/papers/10.1152/jn.00102.2009
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Amano, K., Wandell, B. A., & Dumoulin, S. O. (2009). Visual Field Maps, Population Receptive Field Sizes, and Visual Field Coverage in the Human MT+ Complex. Journal of Neurophysiology. https://doi.org/10.1152/jn.00102.2009

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