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| | Visual cortex - Wikipedia, the free encyclopedia |
 | | Visual area V4 is not tuned for complex objects such as faces, as areas in the inferotemporal cortex are. | | | It is the part of the cerebral cortex that is responsible for processing visual stimuli. | | | The functionally defined primary visual cortex is approximately equivalent to the anatomically defined striate cortex. |
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http://en.wikipedia.org/wiki/Visual_cortex
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| | The Primary Visual Cortex |
| | Such experiments show that the visual cortex learns from experience, and self-organizes its structure to process visual input. | | | Because it very similar to the rest of the neocortex in its anatomical structure, it is widely believed that understanding the structure and function of the primary visual cortex will provide fundamental insights into how the neocortex operates. | | | Remarkably however, the patterns of orientation and ocular dominance are not fixed genetically, but develop from visual experience, mostly after birth. |
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http://nn.cs.utexas.edu/web-pubs/sirosh/pvc.html
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| | LGN and Primary Visual Cortex: Brain areas with Vision |
| | As the name suggests, the primary visual cortex is the first part of the visual cortex which is encountered along the visual pathways. | | | Remember, by this stage in the visual pathway the "other" types of retinal ganglion cell nerve fibres have branched off the visual pathway and made their way to the superior colliculus and other mid-brain structures. | | | This ability is thought to arise from the visual processing that occurs in the superior colliculus and other mid-brain structures even though no conscious visual perception arises from these structures. |
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http://www.brad.ac.uk/acad/lifesci/optometry/resources/modules/stage1/pvp1/LGN.html
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| | fMRI - Recent fMRI Abstracts - Extra Information |
| | The role of primary (striate) visual cortex in human visual perception is the subject of active investigation and diverse hypotheses. | | | The cortical areas associated with the perceptions of the illusory contours and depth were identified as 1) those areas where activity was observed during the illusory contour condition and not during the non-connecting contour control condition, and 2) where activity was observed during the stereo-depth condition and not during the neutral random dot condition. | | | In this study we employ functional (fMRI), topographic, and myeloarchitectonic imaging techniques to identify human primary visual cortex, and show that although primary visual cortex is active during the presence of all visual stimuli, the cortical areas that we have found to be associated exclusively with the perception of illusory contours |
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http://www.fmri.org/proj_more/proj_6.htm
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| | visual cortex |
| | The LGN is the main conduit to the visual cortex and conscious visual perception. | | | The visual cortex contains a columnar organization, meaning that neurons within a column perpendicular to the surface of the cortex have similar response properties - i.e., similar position, orientation, and spatial-frequency selectivities. | | | Simple-cells are quite choosy about the position of the edge, whereas complex-cells will respond to the edge as long as it is in some general region of the image. |
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http://redwood.ucdavis.edu/bruno/psc129/lecture-notes/visual-cortex.html
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| | Research Program |
| | The representation of vision in the cerebral cortex was explored early in this century by the clinical examination of soldiers wounded in battle. | | | The function of the visual system is to guide our behavior by providing an efficient means for the rapid assimilation of information from the environment. | | | The vertical meridian corresponds to the perimeter of primary visual cortex located along the exposed medial surface of the occipital lobe. |
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http://www.ucsf.edu/hortonlab/ResearchProgram.html
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| | Lateral interactions in the primary visual cortex and their role in perception. |
| | The process of visuospatial integration was thought to take place in high-order areas of visual processing, but here we present evidence that the integration process begins as early as the primary visual cortex. | | | Lateral interactions in the primary visual cortex and their role in perception. | | | We find that neurons in the primary visual cortex have response properties that are considerably more complicated than expected from previous studies. |
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http://repository.upenn.edu/dissertations/AAI9953552
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| | Webvision: Visual Cortex |
| | Hubel DH (1982) Exploration of the primary visual cortex, 1955-78. | | | Anatomical hierarchical models place the visual cortical areas into a multi-level processing model based upon the pattern of feedforward, lateral, and feedback pathways found in each area. | | | It is the hope of many researchers, myself included, that a careful investigation into the structure and function of the visual pathways using chemical, electrophysiological, genetic, and behavioural approaches will culminate in a true understanding of how the brain provides us with this most crucial of sensory capabilities, vision. |
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http://webvision.med.utah.edu/VisualCortex.html
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| | Amazon.ca: Books: The Cat Primary Visual Cortex |
| | Shows the cat primary visual cortex is a premier system for the study of the mysteries of vision. | | | The Cat Primary Visual Cortex should emerge as essential reading for all those interested in cerebral cortical processing of visual signals or researching or working in any field of vision. | | | The articles are highly persuasive in showing what can be achieved by carrying out careful and imaginative experiments. |
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http://www.amazon.ca/exec/obidos/ASIN/0125521049
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| | Global and local similarity of the primary visual cortex |
| | For simplicity of expression, we describe the local input-mapping to the supragranular layers in terms of the hemi-retinal visual field, rather than the representations described in equations 1-4. | | | We assume that the transform described in equations 5-7 occurs from at least from the time of early post-natal development, that is, prior to earliest visual experience. | | | Each retinotopic point is able to learn a `snapshot' of points in the visual image whose activity tends to coincide with that retinotopic point. |
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http://astronomy.swin.edu.au/~pbourke/papers/helnet
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| | Eye, Brain, and Vision |
| | cortex's anatomy, it was puzzling to find the physiology so boring. | | | in the visual cortex seemed to work very much like cells in the retina: they | | | I have already mentioned that the flow of information in the cortex takes |
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http://neuro.med.harvard.edu/site/dh/b16.htm
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| | Resources |
| | A Model of Neuronal Responses in Visual Area MT. Vision Research, 38(5):743-761, 1998. | | | Topography of contextual modulations mediated by short-range interactions in primary visual cortex. | | | Color Processing in Macaque Striate Cortex: Relationships to Ocular Dominance, Cytochrome Oxidase, and Orientation. |
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http://www.ee.surrey.ac.uk/Basic/VisualCortex_Resources.html
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| | Mriganka Sur Lab at MIT Abstracts |
| | Yu, H.B., Majewska, A. and Sur, M. Monitoring dendritic spine structure during monocular deprivation in the primary visual cortex of the ferret in vivo. | | | Tropea, D., Majewska, A. and Sur, M. Influence of dark-rearing and subsequent light exposure on spine dynamics of primary visual cortical neurons in vivo. | | | Majewska, A. and Sur, M. Motility of dendritic spines in the developing mouse visual cortex in vivo. |
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http://www.mit.edu/~msur/sfnabstracts_archive.html
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| | Shape perception reduces activity in human primary visual cortex |
| | Activity level as early as the primary visual area can be modulated by high-level percepts in the absence of changes in the physical features of the visual stimuli. | | | Event-related averaging and cross correlation with a template, predicted from subjects' responses, were used to detect the BOLD response associated with each percept. | | | During the course of the experiment, the two percepts (coherent or incoherent) alternated after stable intervals of several to tens of seconds. |
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http://vision.psych.umn.edu/~kersten/kersten-lab/Perceptual.html
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| | primary visual cortex |
| | Modification of callosal afferents of the primary visual cortex ipsilateral to the remaining eye in rats monocularly enucleated at different stages of ontogeny. | | | Long-term dendritic spine stability in the adult cortex. | | | Co-expression of TrkB and the N-methyl-D-aspartate receptor subunits NR1-C1, NR2A and NR2B in the rat visual cortex. |
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http://www.arclab.org/node_pages/1178.html
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| | Primary Visual Cortex II |
| | Synchronization of oscillatory responses in visual cortex correlates with perception in interocular rivalry. | | | The primary visual cortex is perhaps the best understood area of the whole cerebral cortex. | | | Ben-Yishai, R. and Bar-Or, R. and Sompolinsky, H. Theory of orientation tuning in visual cortex. |
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http://www.ini.unizh.ch/~peterk/Lectures/V1course.II.html
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| | The Development of the Primary Visual Cortex |
| | The study of models of the primary visual cortex and the LGN have been major topics in our group. | | | At this stage in the processing some analysis begins to take place. | | | Included in the model are the functions of the retina, the lateral geniculate nucleus (LGN), and the primary visual cortex. |
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http://www.ks.uiuc.edu/Research/Neural/development.html
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| | Mechanisms of contour integration in primary visual cortex. |
| | This allowed us to focus on the whether the interactions observed psychophysically might in fact exist at the level of primary visual cortex and to determine the role, if any, that neurons within primary visual cortex play in integrating spatially discrete regions visual space. | | | To study the effects of local behavior on long-range constraints, we controlled the orientation and spatial frequency bandwidth of stimuli to investigate how the response distribution within a hypercolumn could modulate integration across distance. | | | Mechanisms of contour integration in primary visual cortex. |
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http://repository.upenn.edu/dissertations/AAI3003668
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| | Primary Visual Cortex |
| | The primary visual cortex is perhaps the best understood area of the whole cerebral cortex. | | | Maffei, L. and Fiorentini, A. (1973) The visual cortex as a spatial frequency analyzer. | | | Crook, J. and Eysel, U. GABA-induced inactivation of functionally characterized sites in cat visual cortex (area 18): effects on orientation tuning. |
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http://www.ini.unizh.ch/~matteo/class/ss01-grad
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| | Primary Visual Cortex |
| | We can think of the visual system as containing two primary pathways: the m-pathway, and the p-pathway. | | | This is also what we mean by a topographic map. | | | That is, whichever eye is your "dominant" eye, the one that does most of the work for you (yes, you are "eyedness", just like you are handedness; and no, it is not related to handedness), has all those cells in the same place, same column. |
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http://www.cim.mcgill.ca/~image529/TA529/Image529_99/projects97/31_Khurana/Visualcortex.html
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| | 8031_visual_cortex |
| | Lamme, V.A. Blindsight: the role of feedforward and feedback corticocortical connections. | | | This article was the first to establish retinotopic mapping of visual cortex, based on perceptual pathologies associated with gunshot wounds in Wordl War I. Savoy, R. (2001).History and future directions of human brain mapping and functional neuroimaging. | | | A physiological correlate of the "spotlight" of visual attention. |
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http://vision.psych.umn.edu/~kersten/kersten-lab/courses/Psy8031/LeggeKer-8031_visual_cortex.htm
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| | HKUST Institutional Repository: Item 1783.1/92 |
| | Experimental observations suggest that contour integration may take place in V1. | | | A neural model of contour integration in the primary visual cortex | | | The model is composed of recurrently connected excitatory neurons and inhibitory interneurons, receiving visual input via oriented receptive elds resembling those found in primary visual cortex. |
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http://hdl.handle.net/1783.1/92
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| | UvA DARE |
| | Investigated extra-receptive field contextual modulation (CM) in primary visual cortex (area V1) of 4 awake, behaving macaque monkeys. | | | CM was studied using texture displays in which texture covering the receptive field (RF) was the same in all trials, but the perceptual context of this texture could vary depending on the configuration of extra-RF texture elements. |
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http://dare.uva.nl/record/120194
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| | Find in a Library: The cat primary visual cortex |
| | Find in a Library: The cat primary visual cortex | | | To find a library, type in a postal code, state, province, or country. | | | WorldCat is provided by OCLC Online Computer Library Center, Inc. on behalf of its member libraries. |
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http://worldcatlibraries.org/wcpa/ow/b4d0f26e890b81e3a19afeb4da09e526.html
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