Download or read book Properties of the Spatial Vision of Cat Retinal Ganglion Cells written by Dexiu Shi and published by . This book was released on 1992 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Response of the Cat Retinal Ganglion Cell written by Lawrence Henry Pinto and published by . This book was released on 1970 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Webvision written by Helga Kolb and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parallel Processing in the Visual System written by Jonathan Stone and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the mid-sixties, John Robson and Christina Enroth-Cugell, without realizing what they were doing, set off a virtual revolution in the study of the visual system. They were trying to apply the methods of linear systems analysis (which were already being used to describe the optics of the eye and the psychophysical performance of the human visual system) to the properties of retinal ganglion cells in the cat. Their idea was to stimulate the retina with patterns of stripes and to look at the way that the signals from the center and the antagonistic surround of the respective field of each ganglion cell (first described by Stephen Kuffier) interact to generate the cell's responses. Many of the ganglion cells behaved themselves very nicely and John and Christina got into the habit (they now say) of calling them I (interesting) cells. However. to their annoyance, the majority of neurons they recorded had nasty, nonlinear properties that couldn't be predicted on the basis of simple summ4tion of light within the center and the surround. These uncoop erative ganglion cells, which Enroth-Cugell and Robson at first called D (dull) cells, produced transient bursts of impulses every time the distribution of light falling on the receptive field was changed, even if the total light flux was unaltered.
Download or read book Spatial Vision written by Russell L. DeValois and published by Oxford University Press. This book was released on 1988 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents an integrated view of how we perceive the spatial relations in our visual world, covering anatomical, physiological, psychophysical, and perceptual aspects. The authors discuss the visual system primarily in terms of spatial frequency analysis using a linear systemsapproach. They review evidence supporting a local, patch-by-patch spatial frequency filtering of visual information rather than the global Fourier analysis other researchers have proposed. A separate chapter addresses the special issues surrounding color vision, and a brief, nonmathematicalintroduction to linear systems analysis is included for the uninitiated reader.
Download or read book Modeling Receptive Field Properties of Cat Visual Pathway Neurons Through Spatial and Temporal Population Interactions written by Maureen Ann Valerie Gremillion and published by . This book was released on 1995 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Foundations of Vision written by Brian A. Wandell and published by Sinauer Associates, Incorporated. This book was released on 1995 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed for students, scientists and engineers interested in learning about the core ideas of vision science, this volume brings together the broad range of data and theory accumulated in this field.
Download or read book Research Awards Index written by and published by . This book was released on 1989 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Y Visual Pathway of the Cat written by Chun-I. Yeh and published by . This book was released on 2006 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial Vision written by and published by . This book was released on 1994 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Spatiotemporal Receptive Field Properties of Rat Retinal Ganglion Cells written by Walter Ferdinand Heine and published by . This book was released on 2011 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The function of the retina is to encode relevant features of the visual world in the form of neural spike trains. These are transmitted to higher visual centers in the brain by retinal ganglion cells (RGCs), which form the neural output of the retina. Little is known about the receptive field properties of these cells in the rat. In vivo recording techniques were used to record from RGC axons while visual stimuli were displayed on a cathode ray tube. Rats have a wide visual field and large receptive fields. In order to capture the majority of the visual field, the monitor was placed in close proximity to the eye of the animal. Visual stimulus patterns such as luminance gratings appear distorted at a close viewing distance. We therefore simulated a spherical screen with the eye at its center. Cells shared many properties with those of other species but also exhibited some notable differences. Some cells exhibited the characteristic linear and nonlinear spatial summation of cat X and Y cells and were therefore labeled as X and Y-like. More rarely encountered cell types included the suppressed by contrast and ON-OFF surround cells. In contrast to their counterparts in the cat, X and Y-like cells in the rat had similar receptive field sizes. In the temporal domain, X-like cells exhibited sustained response dynamics to square wave modulated spots. Y-like cells, on the other hand, displayed both sustained and transient response dynamics. Both cell types responded to full field stimuli by reducing their gain at low temporal frequencies and exhibiting a resonance at higher frequencies. These results question the commonly assigned roles of X-like cells in high acuity vision and Y-like cells in motion detection. Anatomical data on their morphological properties and projection pattern will provide additional insight into their possible functional roles. Photodynamic staining provides a means of targeting cells for electrophysiological recordings that display specific morphological and projection patterns. We found enhanced photodynamic staining in media supplemented with oxygen or hydrogen peroxide. This information will aid future experiments correlating the anatomical and electrophysiological properties of RGC types.
Download or read book Nonlinear Vision Determination of Neural Receptive Fields Function and Networks written by Robert B. Pinter and published by CRC Press. This book was released on 2018-05-04 with total page 563 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text brings to vision research a treatment different from that often found in books on the subject in its emphasis on nonlinear aspects of vision, from human perception to eye cells of the fly. There is considerable emphasis on mathematics, which forms not only models but the algorithms for processing data.
Download or read book Response of Cat Retinal Ganglion Cells to Brief Light Flashes written by James Lee Zacks and published by . This book was released on 1967 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physiology of the Eye written by Hugh Davson and published by Bloomsbury Publishing. This book was released on 1990-11-11 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt: For forty years Hugh Davson's Physiology of the Eye has been regarded as the leading textbook in ophthalmology. This extensively revised and updated fifth edition maintains this reputation and presents the author's lifelong expertise to the student. The structure and content have been revised to keep abreast of current teaching and research interests, while maintaining the style and clarity of previous editions.
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1973 with total page 1220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thalamic Function Beyond a Simple Relay written by Vincenzo Crunelli and published by Frontiers Media SA. This book was released on 2016-05-20 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thalamus is often described as a relay. Typified by sensory pathways, this concept leads to thalamic nuclei being viewed as areas that passively streams information from a single source to the cortex, without affecting the nature of that information. However, diverse intrathalamic connections, the varying synaptic and membrane properties of thalamic neurons and the large number of inputs from non-sensory sources make the idea that the thalamus is just a passive relay unlikely. Furthermore, a large number of thalamic nuclei are not primarily driven by sensory signals nor do they exclusively target the cortex, meaning the thalamus must do more than simply pass sensory signals to the cortex. Finally, there is a wealth of research demonstrating that the thalamus does indeed function in ways that are not captured by the concept of a simple relay. So why, given all of this, is the primary paradigm for describing the thalamus, a relay? This Research Topic covers original research, reviews and hypotheses on thalamic function that explore the concept that the thalamus performs computational tasks other than simply passively relaying information.
Download or read book Matters of Intelligence written by L.M. Vaina and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is not an attempt to give a comprehensive treatment of the many facets of intelligence. Rather, the intention is to present multiple approaches to interesting and novel ways of looking at old problems. The focus is on the visual and some of the conceptual intelligences. Vision is man's primary cognitive contact with the world around him, and we are vividly reminded of this by Roman Jakobson's autobiographical note, "The Evasive Initial" with which this volume begins. That we see the world as well as we do is something of a miracle. Looking out through our eyes, our brains give us reliable knowledge about the world around us in all it beauty of form, color and movement. The chapters in the first section look at how this may come about from various perspectives. How from the intensity array which the world casts on the eye's retina does the brain achieve recognition? What may be some of the processes involved in seeing? We see shapes, textures and colors, and subsequently, at the more cognitive levels, recognize them as objects which we can manipulate: we inspect them to discover what to use them for. The objects are tools or food; they are things, beautiful, lovable or frightening. They are things to remember and to talk about to our friends, or to ask someone for. We can ask for many or just a few. They are important to us or trivial.
