Visual field coverage of human V4

Visual field maps, population receptive field sizes, and visual field coverage in the human MT+ complex.

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 ident...

MEG response of human V4 to chromatic visual stimulus

I. Kuriki, K. Sadamoto, and T.Takeda Department of Mathematical Engineering and Information Physics, Graduate School of Engineering, University of Tokyo, Tokyo 113-8656, Japan; Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Co.(JST), Saitama 332-0012, Japan, Department of Complexity Science and Engineering, Graduate School of Frontier Science, Univers...

Topographic organization in and near human visual area V4.

The existence and location of a human counterpart of macaque visual area V4 are disputed. To resolve this issue, we used functional magnetic resonance imaging to obtain topographic maps from human subjects, using visual stimuli and tasks designed to maximize accuracy of topographic maps of the fovea and parafovea and to measure the effects of attention on topographic maps. We identified multipl...

Coverage Quality in Visual Sensor Networks

Equiluminance cells in visual cortical area v4.

We report a novel class of V4 neuron in the macaque monkey that responds selectively to equiluminant colored form. These "equiluminance" cells stand apart because they violate the well established trend throughout the visual system that responses are minimal at low luminance contrast and grow and saturate as contrast increases. Equiluminance cells, which compose ∼22% of V4, exhibit the opposite...