Download or read book The Visual Cortical Interactions Underlying the Perception of Motion written by Agnes Patricia Funk and published by . This book was released on 2002 with total page 263 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 Dynamics of Visual Motion Processing written by Guillaume S. Masson and published by Springer Science & Business Media. This book was released on 2009-12-02 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Motion processing is an essential piece of the complex brain machinery that allows us to reconstruct the 3D layout of objects in the environment, to break camouflage, to perform scene segmentation, to estimate the ego movement, and to control our action. Although motion perception and its neural basis have been a topic of intensive research and modeling the last two decades, recent experimental evidences have stressed the dynamical aspects of motion integration and segmentation. This book presents the most recent approaches that have changed our view of biological motion processing. These new experimental evidences call for new models emphasizing the collective dynamics of large population of neurons rather than the properties of separate individual filters. Chapters will stress how the dynamics of motion processing can be used as a general approach to understand the brain dynamics itself.
Download or read book People Watching written by Kerri Johnson and published by Oxford University Press. This book was released on 2012-12-04 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The human body has long been a rich source of inspiration for the arts, and artists have long recognized the body's special status. While the scientific study of body perception also has an important history, recent technological advances have triggered an explosion of research on the visual perception of the human body in motion, or as it is traditionally called, biological motion perception. Now reaching a point of burgeoning inter-disciplinary focus, biological motion perception research is poised to transform our understanding of person construal. Indeed, several factors highlight a privileged role for the human body as one of the most critical classes of stimuli affecting social perception. Human bodies in motion, for example, are among the most frequent moving stimulus in our environment. They can be readily perceived at a physical distance or visual vantage that precludes face perception. Moreover, body motion conveys meaningful psychological information such as social categories, emotion state, intentions, and underlying dispositions. Thus, body perception appears to serve as a first-pass filter for a vast array of social judgments from the routine (e.g., perceived friendliness in interactions) to the grave (e.g., perceived threat by law enforcement). This book provides an exciting integration of theory and findings that clarify how the human body is perceived by observers.
Download or read book Reciprocal Interactions Between Motion and Form Perception written by P. Sinha and published by . This book was released on 1994 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brain Stimulation written by Juha Silvanto and published by Elsevier Inc. Chapters. This book was released on 2013-11-11 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The challenge in visual neuroscience is to characterize the neuronal properties and functional significance of the numerous regions of the visual cortex, and to understand how they interact during the processing of visual information. The strength of transcranial magnetic stimulation (TMS) in this endeavor is its ability to assess the necessity of visual cortical areas in perceptual functions and to trace the corticocortical interactions that underlie them. Most of the early studies in this field were carried out using the so-called “virtual lesion” approach, in which the impact of TMS was thought to be akin to inducing a brain lesion in the stimulated area. This approach established causal links between specific visual areas and perceptual functions such as motion perception, object processing, and visual awareness. Recently, the view of TMS as a tool for inducing “virtual lesion” has been challenged by a number of experimental findings, giving rise to the conceptualization of TMS effects as a state-dependent interaction between the initial state of the stimulated area and the parameters of the TMS pulse. This state dependency is the basis of paradigms aiming selectively to target specific neuronal representations and thus reveal neuronal tuning properties, a major challenge in the understanding of the cortical visual system.
Download or read book The Senses A Comprehensive Reference written by and published by Academic Press. This book was released on 2020-09-30 with total page 5215 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Senses: A Comprehensive Reference, Second Edition, Seven Volume Set is a comprehensive reference work covering the range of topics that constitute current knowledge of the neural mechanisms underlying the different senses. This important work provides the most up-to-date, cutting-edge, comprehensive reference combining volumes on all major sensory modalities in one set. Offering 264 chapters from a distinguished team of international experts, The Senses lays out current knowledge on the anatomy, physiology, and molecular biology of sensory organs, in a collection of comprehensive chapters spanning 4 volumes. Topics covered include the perception, psychophysics, and higher order processing of sensory information, as well as disorders and new diagnostic and treatment methods. Written for a wide audience, this reference work provides students, scholars, medical doctors, as well as anyone interested in neuroscience, a comprehensive overview of the knowledge accumulated on the function of sense organs, sensory systems, and how the brain processes sensory input. As with the first edition, contributions from leading scholars from around the world will ensure The Senses offers a truly international portrait of sensory physiology. The set is the definitive reference on sensory neuroscience and provides the ultimate entry point into the review and original literature in Sensory Neuroscience enabling students and scientists to delve into the subject and deepen their knowledge. All-inclusive coverage of topics: updated edition offers readers the only current reference available covering neurobiology, physiology, anatomy, and molecular biology of sense organs and the processing of sensory information in the brain Authoritative content: world-leading contributors provide readers with a reputable, dynamic and authoritative account of the topics under discussion Comprehensive-style content: in-depth, complex coverage of topics offers students at upper undergraduate level and above full insight into topics under discussion
Download or read book Neural Mechanisms of Color Vision written by Bevil Richard Conway and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Conway mapped the spatial and temporal structure of the cone inputs to single neurons in the primary visual cortex of the alert macaque. Color cells had receptive fields that were often Double-Opponent, an organization of spatial and chromatic opponency sufficient to form the basis for color constancy and spatial color contrast. Almost all color cells gave a bigger response to color when preceded by an opposite color, suggesting that these cells also encode temporal color contrast. In sum, color perception is likely subserved by a subset of specialized neurons in the primary visual cortex. These cells are distinct from those that likely underlie form and motion perception. Color cells establish three color axes sufficient to describe all colors; moreover these cells are capable of computing spatial and temporal color contrast - and probably contribute to color constancy computations - because the receptive fields of these cells show spatial and temporal chromatic opponency.
Download or read book Vision and Movement written by and published by . This book was released on 1996 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Events written by Thomas F. Shipley and published by Oxford University Press. This book was released on 2008-02-25 with total page 733 pages. Available in PDF, EPUB and Kindle. Book excerpt: We effortlessly recognize all sorts of events--from simple events like people walking to complex events like leaves blowing in the wind. We can also remember and describe these events, and in general, react appropriately to them, for example, in avoiding an approaching object. Our phenomenal ease interacting with events belies the complexity of the underlying processes we use to deal with them. Driven by an interest in these complex processes, research on event perception has been growing rapidly. Events are the basis of all experience, so understanding how humans perceive, represent, and act on them will have a significant impact on many areas of psychology. Unfortunately, much of the research on event perception--in visual perception, motor control, linguistics, and computer science--has progressed without much interaction. This volume is the first to bring together computational, neurological, and psychological research on how humans detect, classify, remember, and act on events. The book will provide professional and student researchers with a comprehensive collection of the latest research in these diverse fields.
Download or read book Laminar Cortical Dynamics of Visual Form and Motion Interactions During Coherent Object Motion Perception written by Julia Berzhanskaya and published by . This book was released on 2006 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seeing Thinking and Knowing written by A. Carsetti and published by Springer Science & Business Media. This book was released on 2004-03-31 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: The world perceived at the visual level is constituted not by objects or static forms, but by processes appearing imbued with meaning. As G. Kanizsa stated, at the visual level the line per se does not exist: only the line which enters, goes behind, divides, etc., a line evolving according to a precise holistic context, in comparison with which function and meaning are indissolubly interlinked. Just as the meaning of words is connected with a universe of highly-dynamic functions and functional processes which operate syntheses, cancellations, integrations, etc. (a universe which can only be described in terms of symbolic dynamics), in the same way, at the level of vision, we must continuously unravel and construct schemata; we must assimilate and make ourselves available for selection by the co-ordinated information penetrating from external Reality. Lastly, we must interrelate all this with the internal selection mechanisms through a precise "journey" into the regions of intensionality. In accordance with these intuitions, we may directly consider, from the more general point of view of contemporary Self-organisation theory, the network of meaningful programs living at the level of neural systems as a complex one which articulates and develops, functionally, within a "coupled universe" characterised by the existence of a double selection: external and internal, the latter regarding the universe of meaning. This network gradually posits itself as the basis for the emergence of natural and meaningful forms and the simultaneous, if indirect, surfacing of an "I-subject-": as the basic instrument, in other words, for the perception of real and meaningful processes, of "objects" possessing meaning, aims, intentions, etc.: above all, of biological objects possessing an inner plan and linked to the progressive expression of a specific cognitive action.
Download or read book Vision and Goal Directed Movement written by Digby Elliott and published by Human Kinetics. This book was released on 2010-02-05 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vision and Goal-Directed Movement: Neurobehavioral Perspectives is also available as an e-book. The e-book is available at a reduced price and allows readers to highlight and take notes throughout the text. When purchased through the Human Kinetics Web site, access to the e-book is immediately granted when the order is received. To interact with the environment, an individual must code, store, and translate spatial information into the appropriate motor commands for achieving an outcome. Working from this premise, Vision and Goal-Directed Movement: Neurobehavioral Perspectives discusses how visual perception, attention, and memory are linked to the processes of movement preparation and execution. With contributions from active researchers in movement science, Vision and Goal-Directed Movement presents the latest theories on the utilization of vision in goal-directed movement control. As a resource for motor control and motor learning researchers, students, educators, and clinicians, Vision and Goal-Directed Movement offers the following: • Comprehensive coverage of current behavior-based literature on the visual control of goal-directed movement • A systematic explication of the sensory and physiological processes and systems responsible for fast, accurate, and efficient performance • A solid foundation for further study of the sensory and neural systems responsible for precise goal-directed behavior • A discussion of how current research on vision and goal-directed movement can assist in creating efficient and safe work environments Using research informed by neural imaging and magnetic brain stimulation, this text provides readers with a better understanding of the neural foundations for goal-directed movement, illustrates the flexibility of the human visuomotor system, and discusses how regulation of movements depends on the learning and developmental history of the performer. It begins by reviewing the works of R.S. Woodworth and the influence of his theories on current research. The majority of the chapters in the first section of the book take a behavioral and process-oriented approach to exploring goal-directed movement. The text then explores the sensory and neural foundations for goal-directed action, including issues related to both pursuit and saccadic eye movements as well as discussion of the specialization of various cortical systems for the regulation of movement. Especially relevant to professionals and scientists concerned with skill instruction and rehabilitation, the final part of the text provides a review of recent research on how and why limb control changes occur with practice and development. In addition, Vision and Goal-Directed Movement considers how the research presented can maximize precision, efficiency, and safety in workspace design. Vision and Goal-Directed Movement: Neurobehavioral Perspectives adds a unique offering to the literature base for motor behavior, demonstrating how advances in both behavioral and neurophysiological methods can inform theories related to the biological systems contributing to skilled performance.
Download or read book Contextual Interactions in Cortical Motion and Surface Perception written by Julia Berzhanskaya and published by . This book was released on 2005 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: This dissertation describes neural modeling and psychophysical experiments that clarify how ambiguous visual signals can be disambiguated by contextual interactions. A neural model of the V1-V2-MT-MST areas of the visual cortex is developed to explain how context can influence motion percepts. Psychophysical experiments clarify how context can influence the perception of gloss on a 3D surface and support earlier model predictions about perceptual surface formation. To process object motion in cluttered environments, the brain has to solve multiple problems. One concerns aperture ambiguity. If a featureless line is observed through an aperture in an occluding surface, the perceived direction of motion is perpendicular to the line and may differ from the real motion direction. Integration of motion across apertures helps to determine the true direction of motion. If multiple moving objects overlap, motion segmentation and motion separation in depth help to limit the areas of motion integration. Figure-ground constraints also help to disambiguate the object to which a moving feature belongs. Thus, both form and motion information are combined in the current 3D FORMOTION model to accurately determine object motion. The model simulates effects of visible and invisible occluders on segregation of motion signals within and across depth, and how object shape and nearby objects can influence motion percepts. The psychophysical experiments clarify how percepts of gloss in an image can change as a function distance on the depicted surface rather than of distance in the image plane. Data suggest that the perception of gloss depends on a spatially local filling-in process, or gloss propagation, that is triggered by distinctive highlight features in the context of a 3D surface representation. Space-variant gloss ratings can be explained by generalizing previous models of brightness perception.
Download or read book Multisensory Perception written by K. Sathian and published by Academic Press. This book was released on 2019-09-15 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multisensory Perception: From Laboratory to Clinic surveys the current state of knowledge on multisensory processes, synthesizing information from diverse streams of research and defining hypotheses and questions to direct future work. Reflecting the nature of the field, the book is interdisciplinary, comprising the findings and views of writers with diverse backgrounds and varied methods, including psychophysical, neuroanatomical, neurophysiological and neuroimaging approaches. Sections cover basic principles, specific interactions between the senses, the topic of crossmodal correspondences between particular sensory attributes, the related topic of synesthesia, and the clinic. - Offers a comprehensive, up-to-date overview of the current state of knowledge on multisensory processes - Coverage includes basic principles, specific interactions between the senses, crossmodal correspondences and the clinical aspects of multisensory processes - Includes psychophysical, neuroanatomical, neurophysiological and neuroimaging approaches
Download or read book Discovering the Brain written by National Academy of Sciences and published by National Academies Press. This book was released on 1992-01-01 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: The brain ... There is no other part of the human anatomy that is so intriguing. How does it develop and function and why does it sometimes, tragically, degenerate? The answers are complex. In Discovering the Brain, science writer Sandra Ackerman cuts through the complexity to bring this vital topic to the public. The 1990s were declared the "Decade of the Brain" by former President Bush, and the neuroscience community responded with a host of new investigations and conferences. Discovering the Brain is based on the Institute of Medicine conference, Decade of the Brain: Frontiers in Neuroscience and Brain Research. Discovering the Brain is a "field guide" to the brainâ€"an easy-to-read discussion of the brain's physical structure and where functions such as language and music appreciation lie. Ackerman examines: How electrical and chemical signals are conveyed in the brain. The mechanisms by which we see, hear, think, and pay attentionâ€"and how a "gut feeling" actually originates in the brain. Learning and memory retention, including parallels to computer memory and what they might tell us about our own mental capacity. Development of the brain throughout the life span, with a look at the aging brain. Ackerman provides an enlightening chapter on the connection between the brain's physical condition and various mental disorders and notes what progress can realistically be made toward the prevention and treatment of stroke and other ailments. Finally, she explores the potential for major advances during the "Decade of the Brain," with a look at medical imaging techniquesâ€"what various technologies can and cannot tell usâ€"and how the public and private sectors can contribute to continued advances in neuroscience. This highly readable volume will provide the public and policymakersâ€"and many scientists as wellâ€"with a helpful guide to understanding the many discoveries that are sure to be announced throughout the "Decade of the Brain."
Download or read book The Human Auditory Cortex written by David Poeppel and published by Springer Science & Business Media. This book was released on 2012-04-12 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: We live in a complex and dynamically changing acoustic environment. To this end, the auditory cortex of humans has developed the ability to process a remarkable amount of diverse acoustic information with apparent ease. In fact, a phylogenetic comparison of auditory systems reveals that human auditory association cortex in particular has undergone extensive changes relative to that of other species, although our knowledge of this remains incomplete. In contrast to other senses, human auditory cortex receives input that is highly pre-processed in a number of sub-cortical structures; this suggests that even primary auditory cortex already performs quite complex analyses. At the same time, much of the functional role of the various sub-areas in human auditory cortex is still relatively unknown, and a more sophisticated understanding is only now emerging through the use of contemporary electrophysiological and neuroimaging techniques. The integration of results across the various techniques signify a new era in our knowledge of how human auditory cortex forms basis for auditory experience. This volume on human auditory cortex will have two major parts. In Part A, the principal methodologies currently used to investigate human auditory cortex will be discussed. Each chapter will first outline how the methodology is used in auditory neuroscience, highlighting the challenges of obtaining data from human auditory cortex; second, each methods chapter will provide two or (at most) three brief examples of how it has been used to generate a major result about auditory processing. In Part B, the central questions for auditory processing in human auditory cortex are covered. Each chapter can draw on all the methods introduced in Part A but will focus on a major computational challenge the system has to solve. This volume will constitute an important contemporary reference work on human auditory cortex. Arguably, this will be the first and most focused book on this critical neurological structure. The combination of different methodological and experimental approaches as well as a diverse range of aspects of human auditory perception ensures that this volume will inspire novel insights and spurn future research.
