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THE HUMAN VISUAL CORTEX - Stanford University

the primary visual cortex is topographic, in that nearby regions on the retina project to nearby cortical regions In the cortex, neighboring positions in the visual field tend to be represented by groups of neurons that are adjacent but laterally displaced within the cortical gray matter The mapping between the retina and the cortex can be best described as a log-polar transformation, in


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Visual cortex: cartography, connectivity, and concurrent

Visual cortex: cartography, connectivity, and concurrent processing James J Knierim and David C Van Essen California Institute of Technology, Pasadena, California, USA The mammalian visual cortex contains a complex mosaic of areas that are richly connected with one another Recent progress has advanced our understanding of both macroscopic and microscopic aspects of cortical organization


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Graphical Models of the Visual Cortex - Stanford University

the visual cortex, and how the challenges faced in developing such models suggest areas where current theory falls short and might be extended A graphical model is a useful formalism for compactly describing a joint probability distribution character-ized by very large number of random variables We are taking what is known about the anatomy and physiology of the primate visual cortex and


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Traveling Waves in Visual Cortex - Free

visual cortex, in the horizontal dimension, and at fairly high speeds (about 0 1–0 4 m/s) Other waves travel much slower, for instance, in binocular rivalry ( 0 018 m/s; Lee et al , 2005) or in spreading depression ( 0 00007 m/s; Lauritzen, 2001) We do not review the large literature on traveling waves in turtle cortex (Nenadic et al , 2003) or in nonvisual sensory or motor cortices of


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Sensory uncertainty decoded from visual cortex predicts

from visual cortex predicts behavior Ruben S van Bergen 1, Wei Ji Ma 2, Michael S Pratte 3 & Janneke F M Jehee 1 Bayesian theories of neural coding propose that sensory uncertainty is represented by a probability distribution encoded in neural population activity, but direct neural evidence supporting this hypothesis is currently lacking Using fMRI in combination with a generative


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Functionally specific optogenetic modulation in primate

Primate visual cortex is organized into columns that process different features of a visual scene, such as color, orientation preference,andoculardominance Untilnow,theirsmallsizehas made it difficult to modulate them directly Here, we report for the first time that focal targeting of light-sensitive ion channels (channelrhodopsins) in macaques using lentiviral vectors allows one to stimulate


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THE HUMAN VISUAL CORTEX - Stanford University

the primary visual cortex is topographic, in that nearby regions on the retina project to nearby cortical regions In the cortex, neighboring positions in the visual field tend to be represented by groups of neurons that are adjacent but laterally displaced within the cortical gray matter The mapping between the retina and the cortex can be best described as a log-polar transformation, in


PDF

Visual cortex: cartography, connectivity, and concurrent

Visual cortex: cartography, connectivity, and concurrent processing James J Knierim and David C Van Essen California Institute of Technology, Pasadena, California, USA The mammalian visual cortex contains a complex mosaic of areas that are richly connected with one another Recent progress has advanced our understanding of both macroscopic and microscopic aspects of cortical organization


PDF

Graphical Models of the Visual Cortex - Stanford University

the visual cortex, and how the challenges faced in developing such models suggest areas where current theory falls short and might be extended A graphical model is a useful formalism for compactly describing a joint probability distribution character-ized by very large number of random variables We are taking what is known about the anatomy and physiology of the primate visual cortex and


PDF

Traveling Waves in Visual Cortex - Free

visual cortex, in the horizontal dimension, and at fairly high speeds (about 0 1–0 4 m/s) Other waves travel much slower, for instance, in binocular rivalry ( 0 018 m/s; Lee et al , 2005) or in spreading depression ( 0 00007 m/s; Lauritzen, 2001) We do not review the large literature on traveling waves in turtle cortex (Nenadic et al , 2003) or in nonvisual sensory or motor cortices of


PDF

Sensory uncertainty decoded from visual cortex predicts

from visual cortex predicts behavior Ruben S van Bergen 1, Wei Ji Ma 2, Michael S Pratte 3 & Janneke F M Jehee 1 Bayesian theories of neural coding propose that sensory uncertainty is represented by a probability distribution encoded in neural population activity, but direct neural evidence supporting this hypothesis is currently lacking Using fMRI in combination with a generative


PDF

Functionally specific optogenetic modulation in primate

Primate visual cortex is organized into columns that process different features of a visual scene, such as color, orientation preference,andoculardominance Untilnow,theirsmallsizehas made it difficult to modulate them directly Here, we report for the first time that focal targeting of light-sensitive ion channels (channelrhodopsins) in macaques using lentiviral vectors allows one to stimulate


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a visual cortex





[PDF] Visual Cortex in Humans - Spinoza Centre for Neuroimaging

The areas within human visual cortex are identified by measuring visual field maps These are cortical regions that contain a topographic representation of the 

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[PDF] Visual Cortex

Visual Cortex Vision Science Lectures in Ophthalmology retina-LGN-cortex KSJ, Fig 27-4 Glickstein M “The discovery of the visual cortex”

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Activation of human primary visual cortex during visual recall - PNAS

During recall of a visual stimulus, focal increases in signal related to changes in blood flow were detected in Vl and V2 cortex in five of seven subjects

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Visual Cortex: How Are Faces and Objects Represented? - Cell Press

Visual areas of the brain involved in object recognition form a processing stream that projects toward the temporal lobe [1] Lesions to this region of the 

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A Division of Light and Dark in the Visual Cortex

18 nov 2015 · selectivity in the upper layers of ferret visual cortex Long before early civilizations drew up their first maps, the brain had already

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[PDF] The role of the primary visual cortex in higher level vision

In the classical feed-forward, modular view of visual processing, the primary visual cortex (area V1) is a module that serves to

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[PDF] Pattern formation in the visual cortex - Institut de Mathématiques de

Examples in visual neuroscience include the ring model of orientation tuning, cortical models of geometric visual hallucinations (that will be studied here) and 

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Receptive Fields in Human Visual Cortex Mapped with Surface

In addition, we use this technique to estimate the cortical magnification factor in early human visual cortex The spatial and temporal resolution of cortical 

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Domain Specificity in Visual Cortex

In the present study, we used functional magnetic resonance imaging (fMRI) to test whether the cortical structures responsible for human visual recognition

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Visual Cortex Activity in Early and Late Blind People - Journal of

We observed activity throughout portions of visual cortex in all blind individ- uals engaged in a Braille reading task, regardless of the age of blindness onset 

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[PDF] Primary Visual Pathway - Psychology Nottingham

Information-processing stages in primary visual pathway Lateral geniculate body Optic nerve Retina Visual cortex Photo- receptors Bipolar

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[PDF] How are visual areas of the brain connected to motor areas for the

The first step in the pathway from the primary visual cortex is by way of the dorsal stream of visual areas in the parietal lobe The fact that monkeys can still 

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[PDF] Representation of naturalistic image structure in the primate visual

Neurons in the primary visual cortex (V1) are selective for local orientation and spatial scale of visual input (Hubel and Wiesel, 1962, 1968; DeValois et al , 

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[PDF] The visual cortex as a crystal

Following our own recent work on orientation and spatial frequency tuning in a cortical hypercolumn [14,15], the network topology of each hypercolumn is taken 

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[PDF] Molecular basis of plasticity in the visual cortex - Life Sciences at

A paradigmatic example is the effect of monocular deprivation on ocu- lar dominance of visual cortical neurons Although visual cortical plasticity has been 

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[PDF] The Visual System: Central Visual Pathways

It receives inputs from both eyes and relays these messages to the primary visual cortex via the optic radiation The retinal Magno and Parvo ganglion cells 

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THE NEURAL ARCHITECTURE OF BINOCULAR VISION - Nature

does the dorsal lateral geniculate nucleus (LGN) play a special role in binocular vision? Finally, are ocular dominance columns of primary visual cortex impor

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[PDF] RedalycVisual imagery without visual perception?

imagery and visual perception share the same mechanisms and cortical areas primary visual cortex, or can this be made only through the activation of

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[PDF] The role of primary visual cortex (V1) in visual awareness - CORE

Keywords: Visual awareness; Consciousness; Visual cortex; Neural correlate; Synchrony; is to what extent the nerve cells in visual cortical area

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[PDF] PRIMARY VISUAL CORTEX AND VISUAL AWARENESS

PRIMARY VISUAL CORTEX AND VISUAL AWARENESS Frank Tong The primary visual cortex (V1) is probably the best characterized area of primate cortex, but

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[PDF] The Visual Cortex is a Contact Bundle - Caltech

It follows that the connection for the cortical contact bundle is a Lie group connection The paper closes with an axiomatic treatment of visual perception and 

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[PDF] Retinotopic orgarnzation of the primary visual cortex of flying foxes

The cortical magnification factor decreases with increasing eccentricity, following a negative power function Conversely, receptive field sizes increase 

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[PDF] Collective Oscillations in the Visual Cortex

The firing patterns of populations of cells in the cat visual cor- tex can exhibit oscillatory responses in Collective Oscillations in the Visual Cortex

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[PDF] THE HUMAN VISUAL CORTEX Kalanit Grill-Spector1 and Rafael

Thus, more than a dozen putative human visual areas have been described using fMRI (Tootell 1996, 2003) The discovery and analysis of cortical visual areas 

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[PDF] Hierarchical Bayesian Inference in the Visual Cortex - Harvard DASH

A prevalent view in the biological community on the role of feedback among cortical areas is that of selective attention modeled by biased competition 10–12

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[PDF] Contextual signals in visual cortex - UCL Discovery

a cortical circuit model that included interactions between multiple inhibitory cell types [30] 43 The opposite sign of SOM cell responses during locomotion 

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[PDF] Retinotopic fMRI Reveals Visual Dysfunction and Functional

notopic, primary open-angle glaucoma, visual cortex, visual field, functional magnetic resonance imaging, blood oxygenation level dependent (BOLD) fMRI

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[PDF] Principles of Image Representation in Visual Cortex - Redwood

The essential idea is that the visual cortex contains a probabilistic model of images, and that the activ- ities of neurons are representing images in terms of

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[PDF] VISUAL PATHWAYS

Visual pathways: From retina to the cortex • Information processing in visual cortex Cerebral cortex is differentiated into 6 horizontal layers 

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Working Memory in the Primary Visual Cortex - JAMA Network

The primary visual cortex is the first cortical area of the visual system that receives in- formation from the external visual world

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[PDF] New images from human visual cortex - UCSD CogSci

THE FIRST evidence that cerebral cortex is com- posed of separate areas came from a study of part of the visual cortex1 more than two centuries ago

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[PDF] Towards a theory of computation in the visual cortex - Serre Lab

to characterize the receptive field of orientation-selective cells as found in the primary visual cortex We use this model as a case in point for 

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Visual cortex: cartography, connectivity, and concurrent processing

More than half of the cerebral cortex in the macaque monkey is largely or exclusively involved in visual pro- cessing This overall domain of visual cortex 

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[PDF] On the Prospects for Building a Working Model of the Visual Cortex

model of the visual cortex inspired by David Mumford's computational architecture (1991; 1992; 2003) At that same meeting, Jeff Hawkins gave an invited 

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[PDF] Retinotopic Organization in Human Visual Cortex and the Spatial

Human primary visual cortex (area V1) is located in the occipital lobe within and surrounding the calcarine sulcus Data from human lesion studies showed that 

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[PDF] Combined Activation and Deactivation of Visual Cortex During

26 nov 2006 · The involvement of occipital cortex in sensory processing is not restricted solely to the visual modality Tactile processing has been shown to 

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[PDF] Optogenetic visual cortical prosthesis

Brindley,G S ,Lewin,W S ,1968 The visual sensations produced by electrical stimulation of the medial occipital cortex J Physiol 19454-5P

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  1. THE HUMAN VISUAL CORTEX - Stanford University

    the primary visual cortex is topographic
  2. in that nearby regions on the retina project to nearby cortical regions In the cortex
  3. neighboring positions in the visual field tend to be represented by groups of neurons that are adjacent but laterally displaced within the cortical gray matter The mapping between the retina and the cortex can be best described as a log-polar transformation
  4. in


    97199);" style="color:blue;cursor:pointer;font-size:1.1em;">PDF

    Visual cortex: cartography

  5. connectivity
  6. and concurrent Visual cortex: cartography
  7. connectivity
  8. and concurrent processing James J Knierim and David C Van Essen California Institute of Technology
  9. Pasadena
  10. California
  11. USA The mammalian visual cortex contains a complex mosaic of areas that are richly connected with one another Recent progress has advanced our understanding of both macroscopic and microscopic aspects of cortical organization


    43190);" style="color:blue;cursor:pointer;font-size:1.1em;">PDF

    Graphical Models of the Visual Cortex - Stanford University

    the visual cortex
  12. and how the challenges faced in developing such models suggest areas where current theory falls short and might be extended A graphical model is a useful formalism for compactly describing a joint probability distribution character-ized by very large number of random variables We are taking what is known about the anatomy and physiology of the primate visual cortex and


    73265);" style="color:blue;cursor:pointer;font-size:1.1em;">PDF

    Traveling Waves in Visual Cortex - Free

    visual cortex
  13. in the horizontal dimension
  14. and at fairly high speeds (about 0 1–0 4 m/s) Other waves travel much slower
  15. for instance
  16. in binocular rivalry ( 0 018 m/s; Lee et al
  17. 2005) or in spreading depression ( 0 00007 m/s; Lauritzen
  18. 2001) We do not review the large literature on traveling waves in turtle cortex (Nenadic et al
  19. 2003) or in nonvisual sensory or motor cortices of


    62265);" style="color:blue;cursor:pointer;font-size:1.1em;">PDF

    Sensory uncertainty decoded from visual cortex predicts

    from visual cortex predicts behavior Ruben S van Bergen 1
  20. Wei Ji Ma 2
  21. Michael S Pratte 3 & Janneke F M Jehee 1 Bayesian theories of neural coding propose that sensory uncertainty is represented by a probability distribution encoded in neural population activity
  22. but direct neural evidence supporting this hypothesis is currently lacking Using fMRI in combination with a generative


    87512);" style="color:blue;cursor:pointer;font-size:1.1em;">PDF

    Functionally specific optogenetic modulation in primate

    Primate visual cortex is organized into columns that process different features of a visual scene
  23. such as color
  24. orientation preference
  25. andoculardominance Untilnow
  26. theirsmallsizehas made it difficult to modulate them directly Here
  27. we report for the first time that focal targeting of light-sensitive ion channels (channelrhodopsins) in macaques using lentiviral vectors allows one to stimulate


    23096);" style="color:blue;cursor:pointer;font-size:1.1em;">PDF

a visual cortex Document PDF,PPT, and Doc

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