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The introduction of functional magnetic resonance imaging made it possible to identify visual field maps in human cortex, including several near (1) medial occipital (V1,V2,V3), (2) lateral occipital (LO-1,LO-2, hMT+), (3) ventral occipital (hV4, VO-1, VO-2), (4) dorsal occipital (V3A, V3B), and (5) posterior parietal cortex (IPS-0 to IPS-4).
25 paź 2007 · Visual field maps have been linked to functional and perceptual properties of the visual system at various spatial scales, ranging from the level of individual maps to map clusters to dorsal-ventral streams.
Visual field maps have been linked to functional and per-ceptual properties of the visual system at various spatial scales, ranging from the level of individual maps to map clusters to dorsal-ventral streams.
The areas within human visual cortex are identified by measuring visual field maps. These are cortical regions that contain a topographic representation of the visual field; stimuli adjacent in the visual field evoke responses that are adjacent in visual cortex.
important larger scale organizing principles of visual cortical organization is the visual field map (VFM): neurons whose visual receptive fields lie next to one another in visual space are located next to one another in cortex, forming one complete representation of contralateral visual space [3].
The first coordinated measurements of visual field maps and stimulus responsivity to color, objects and faces in ventral occipital cortex are presented, supporting a model that includes a hemifield map, hV4, adjacent to the central field representation of ventral V3.
The position, surface area and visual field representation of human visual areas V1, V2 and V3 were measured using fMRI in 7 subjects (14 hemispheres). Cortical visual field maps of the central 12 deg were measured using rotating wedge and expanding ring stimuli.
