Visual System: Functional Architecture of Area V2

Roe, Anna Wang; Chen, G.; Lu, Haidong

doi:10.1016/b978-008045046-9.00215-1

Cited by 10 publications

(18 citation statements)

References 24 publications

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“…The fact that motion maps, disparity maps, and hue maps arise in secondary areas (V2 and MT) but not the first stage (V1) may indicate common functional transformations across feature modalities (cf. Roe et al 2009). …”

Section: Discussionmentioning

confidence: 99%

“…Functional domains of such a size, such as color blobs in V1, are readily detected by optical imaging methods. We routinely detect color blobs (which are 0.15–0.2mm in size) in V1 (Lu et al 2008) and even subregions of single blobs that exhibit different hue preference (Xiao et al 2007, Roe et al 2009). Although one still cannot rule out the possibility that the size of directional clustering is so small (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…We have established standard methods for revealing the different functional stripe types (thin, pale, and thick) with optical imaging methods (for review, see Roe and T’so 1997, Roe 2003, Roe et al 2007, 2009). As a full thin/pale/thick/pale stripe cycle spans approximately 4 mm, multiple stripes of a single type can be readily imaged within a single cm-sized field of view.…”

Section: Introductionmentioning

confidence: 99%

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A Motion Direction Map in Macaque V2

Chen

Tanigawa

et al. 2010

Neuron

107

105

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SUMMARY In mammals, the perception of motion starts with direction-selective neurons in the visual cortex. Despite numerous studies in monkey V1 and V2 (primary and second visual cortex), there has been no evidence of direction maps in these areas. In the present study, we used optical imaging methods to study the organization of motion response in Macaque monkey V1 and V2. In contrast to the findings in other mammals (e.g. cats and ferrets), we found no direction maps in macaque V1. Robust direction maps, however, were found in V2 thick/pale stripes and avoided thin stripes. In many cases direction maps were located within thick stripes and exhibited pinwheel or linear organizations. The presence of motion maps in V2 points to a new found prominence of V2 in motion processing, either for contributing to motion perception in the dorsal pathway and/or for motion-cue dependent form perception in the ventral pathway.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Motion Direction Map in Macaque V2

Chen

Tanigawa

et al. 2010

Neuron

107

105

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“…This line of questioning has been successfully used to examine transformations that occur in other visual areas. For example, by identifying transformations across different submodalities of color (thin stripes), contour (thick/pale), depth (thick), and motion (thick), the functional transformations unique to V2 were characterized (Roe, 2003; Roe et al, 2009; Lu et al, 2010). An important viewpoint that emerged is that functional organization matters.…”

Section: V4 Is a Midtier Feature Representation Area: Computatiomentioning

confidence: 99%

“…Is there a common functional transformation that V4 performs across these multiple feature modalities? A better understanding of V4 function may come from studies that directly compare responses to multiple featural spaces, akin to those that have been conducted in V2 (e.g., Roe et al, 2009 for review) and in inferotemporal areas (e.g., Vinberg and Grill-Spector, 2008). …”

Section: V4 Is a Midtier Feature Representation Area: Computatiomentioning

confidence: 99%

Toward a Unified Theory of Visual Area V4

Roe

Chelazzi

Connor

et al. 2012

Neuron

326

250

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Visual area V4 is a midtier cortical area in the ventral visual pathway. It is crucial for visual object recognition and has been a focus of many studies on visual attention. However, there is no unifying view of V4’s role in visual processing. Neither is there an understanding of how its role in feature processing interfaces with its role in visual attention. This review captures our current knowledge of V4, largely derived from electrophysiological and imaging studies in the macaque monkey. Based on recent discovery of functionally specific domains in V4, we propose that the unifying function of V4 circuitry is to enable selective extraction of specific functional domain-based networks, whether it be by bottom-up specification of object features or by top-down attentionally driven selection.

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The Organization of Orientation-Selective, Luminance-Change and Binocular- Preference Domains in the Second (V2) and Third (V3) Visual Areas of New World Owl Monkeys as Revealed by Intrinsic Signal Optical Imaging

Kaskan

Dillenburger

et al. 2008

Cerebral Cortex

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Optical imaging was used to map patterns of visually evoked activation in the second (V2) and third (V3) visual areas of owl monkeys. Modular patterns of activation were produced in response to stimulation with oriented gratings, binocular versus monocular stimulation, and stimuli containing wide-field luminance changes. In V2, luminance-change domains tended to lie between domains selective for orientation. Regions preferentially activated by binocular stimulation co-registered with orientation-selective domains. Co-alignment of images with cytochrome oxidase (CO)-processed sections revealed functional correlates of 2 types of CO-dense regions in V2. Orientation-responsive domains and binocular domains were correlated with the locations of CO-thick stripes, and luminance-change domains were correlated with the locations of CO-thin stripes. In V3, orientation preference, luminance-change, and binocular preference domains were observed, but were more irregularly arranged than those in V2. Our data suggest that in owl monkey V2, consistent with that in macaque monkeys, modules for processing contours and binocularity exist in one type of compartment and that modules related to processing-surface features exist within a separate type of compartment.

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Visual System: Functional Architecture of Area V2

Cited by 10 publications

References 24 publications

A Motion Direction Map in Macaque V2

A Motion Direction Map in Macaque V2

Toward a Unified Theory of Visual Area V4

The Organization of Orientation-Selective, Luminance-Change and Binocular- Preference Domains in the Second (V2) and Third (V3) Visual Areas of New World Owl Monkeys as Revealed by Intrinsic Signal Optical Imaging

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