The Neural Mechanisms Underlying The Perception Of Visual Illusions
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The Neural Mechanisms Underlying The Perception Of Visual Illusions
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Author : Hang Zeng
language : en
Publisher:
Release Date : 2020
The Neural Mechanisms Underlying The Perception Of Visual Illusions written by Hang Zeng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
The Oxford Compendium Of Visual Illusions
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Author : Arthur Gilman Shapiro
language : en
Publisher: Oxford University Press
Release Date : 2017
The Oxford Compendium Of Visual Illusions written by Arthur Gilman Shapiro and has been published by Oxford University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Medical categories.
Visual illusions are compelling phenomena that draw attention to the brain's capacity to construct our perceptual world. The Compendium is a collection of over 100 chapters on visual illusions, written by the illusion creators or by vision scientists who have investigated mechanisms underlying the phenomena. --
Neural Mechanisms Underlying Core Visual Perception Of Objects
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Author :
language : en
Publisher:
Release Date : 2015
Neural Mechanisms Underlying Core Visual Perception Of Objects written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Visual perception of objects is a computationally challenging problem and fundamental to human well-being. Extensive previous research has revealed that the inferior temporal cortex (IT), a high-level visual area, is involved in various aspects of visual perception. Yet, little is known about: how IT neural responses to objects support human perception of the objects; and how IT responses are produced from retinal images of objects. The goal of this research is to tackle these two related questions and find out explicit, quantitative mechanisms that describe human core visual perception of objects, a remarkable ability achieved with brief (
Neural Processes Underlying An Auditory Induced Visual Illusion
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Author : Jyoti Mishra
language : en
Publisher:
Release Date : 2008
Neural Processes Underlying An Auditory Induced Visual Illusion written by Jyoti Mishra and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Perception is multimodal in that it results from the integration of sensory inputs simultaneously provided by natural stimuli in multiple modalities. Investigations on how the brain combines information from different senses are key to understanding the mechanism of perception. Multisensory illusions are an interesting aspect of integration of the senses, wherein the percept in one modality is altered by the co-presentation of stimuli in another modality. The neural bases of such illusions can provide fundamental insights into the implementation of sensory integration in the brain, yet have not been investigated in much detail. One such illusion is the sound-induced extra flash illusion wherein a flash presented in conjunction with two pulsed sounds generates the percept of two flashes, of which the second is illusory (Shams et al., 2000, 2002). A thorough analysis of the cortical mechanisms that underlie this striking audio-visual illusion is the focus of the present thesis. The neural correlates of the sound-induced illusory extra flash were investigated using event related potential (ERP) recordings that provide high temporal resolution, along with anatomical source localization techniques. The sensory properties of the illusory flash were further explored in a behavioral study. The key findings revealed that the illusion results from a rapid dynamic interplay between processing in auditory and visual cortical areas in conjunction with activity within polymodal superior temporal cortex. This activation sequence included the finding of a novel ERP component, the PD120, that was elicited rapidly within 30-60 ms of the second sound in the illusion inducing audio-visual configuration. The amplitude of the PD120 was found to be strongly correlated with the frequency of illusory percepts in individual subjects. Source localization analyses in two separate studies, and the absence of polarity inversion of the PD120 component as a function of stimulus field location, demonstrated that the principal generator of this component lies outside of striate cortex, in the ventral occipito-temporal region of extrastriate visual cortex. It was also found that subjects who frequently perceived the illusion showed this early modulation (PD120) in response to other combinations of auditory and visual stimuli, thus pointing to consistent individual differences in the neural connectivity that underlies cross-modal integration. Attention was found to significantly enhance the cross-modal integration processes underlying the illusion and in particular was shown to be crucial to the generation of the PD120 component. Finally, a behavioral study found that the extra flash illusion is a robust phenomenon that can be generated for visual stimulus features such as color and basic shape. Overall the findings underscore the emerging view that multisensory integration involves a rapid dynamic interplay, rather than a serial progression, between unisensory cortices and the traditional cortical association areas such as the superior temporal region. These studies emphasize further that even though unisensory brain areas show preferential responsiveness to a specific modality, they are crucial to the process of multimodal perception.
Neural Mechanisms Of Visual Perception
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Author : Retina Research Foundation (U.S.). Symposium
language : en
Publisher:
Release Date : 1989
Neural Mechanisms Of Visual Perception written by Retina Research Foundation (U.S.). Symposium and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Nature categories.
The Visual Brain In Action
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Author : David Milner
language : en
Publisher: OUP Oxford
Release Date : 2006-10-12
The Visual Brain In Action written by David Milner and has been published by OUP Oxford this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-10-12 with Psychology categories.
First published in 1995, The Visual Brain in Action remains a seminal publication in the cognitive sciences. It presents a model for understanding the visual processing underlying perception and action, proposing a broad distinction within the brain between two kinds of vision: conscious perception and unconscious 'online' vision. It argues that each kind of vision can occur quasi-independently of the other, and is separately handled by a quite different processing system. In the 11 years since publication, the book has provoked considerable interest and debate - throughout both cognitive neuroscience and philosophy, while the field has continued to flourish and develop. For this new edition, the text from the original edition has been left untouched, standing as a coherent statement of the authors' position. However, a very substantial epilogue has been added to the book in which Milner and Goodale review some of the key developments that support or challenge the views that were put forward in the first edition. The new chapter summarizes developments in various relevant areas of psychology, neuroscience and behaviour. It notably supplements the main text by updating the reader on the contributions that have emerged from the use of functional neuroimaging, which was in its infancy when the first edition was written. Neuroimaging, and functional MRI in particular, has revolutionized the field over the past 11 years by allowing investigators to plot in detail the patterns of activity within the visual brains of behaving and perceiving humans. The authors show how its use now allows scientists to test and confirm their proposals, based as they then were largely on evidence accrued from primate neuroscience in conjunction with studies of neurological patients.
Seeing Is Deceiving
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Author : Stanley Coren
language : en
Publisher:
Release Date : 1978
Seeing Is Deceiving written by Stanley Coren and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Games & Activities categories.
The Two Sides Of Perception
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Author : Richard B. Ivry
language : en
Publisher: MIT Press
Release Date : 1998
The Two Sides Of Perception written by Richard B. Ivry and has been published by MIT Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Brain categories.
Anatomically, the central nervous system looks remarkably symmetrical--from the relatively simple structures of the spinal cord to the extensively convoluted folds of the cerebral hemispheres. At the functional level, however, there are striking differences between the left and right hemispheres. Although popular writings attribute language abilities to the left hemisphere and spatial abilities to the right, differences in hemispheric function appear to be more subtle. According to Ivry and Robertson, asymmetries over a wide range of perceptual tasks reflect a difference in strength rather than kind, with both hemispheres contributing to the performance of complex tasks, whether linguistic or spatial. After an historical introduction, the authors offer a cognitive neuroscience perspective on hemispheric specialization in perception. They propose that the two hemispheres differ in how they filter task-relevant sensory information. Building on the idea that the hemispheres construct asymmetric representations, the hypothesis provides a novel account of many laterality effects. A notable feature of the authors' work is their attempt to incorporate hemispheric specialization in vision, audition, music, and language within a common framework. In support of their theory, they review studies involving both healthy and neurologically impaired individuals. They also provide a series of simulations to demonstrate the underlying computational principles of their theory. Their work thus describes both the cognitive and neurological architecture of hemispheric asymmetries in perception.
Neuronal Mechanisms Of Visual Perception
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Author : Camilo David Libedinsky
language : en
Publisher:
Release Date : 2009
Neuronal Mechanisms Of Visual Perception written by Camilo David Libedinsky and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Sensory perception has been the subject of scientific and philosophical inquiry for centuries, and it is well accepted that it is closely related to the workings of the brain. However, the precise relationship between brain activity and sensory perception remains elusive. Visual illusions are useful tools to study the workings of the brain. Motion- induce blindness (MIB), one such illusion, renders an unchanging visual target intermittently invisible when surrounded by an array of moving distractors. Here I explore the relationship between brain activity and sensory perception by recording the activity of single neurons in the brain of awake-behaving monkeys, while they experience motion-induced blindness. Monkeys were trained to report, using a lever press, whether they saw a small visual target appear or disappear. Recordings were made from primary visual cortex (V1) and frontal-eye field (FEF), while monkeys reported their perceptual state during MIB. Results show that activity in VI is related primarily to stimulus parameters, regardless of the perceptual state of the monkeys, whereas FEF shows the opposite behavior, with activity correlated to perceptual state of the monkey regardless of stimulus parameters. Based on the response properties of V1 cells I propose a conceptual model by which different brain areas might contribute to the perceptual disappearance in this illusion. The neuronal responses recorded from FEF are, thus far, the temporally earliest known to correlate with perceptual state when it is dissociated from the physical stimulus, and will need to be taken into consideration by any theory of perceptual consciousness.
Research On The Analysis Of The Neural Mechanisms Underlying Perception
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Author : DAVID M. VOWIES
language : en
Publisher:
Release Date : 1961
Research On The Analysis Of The Neural Mechanisms Underlying Perception written by DAVID M. VOWIES and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with categories.