Download or read book The Active Control of Self Movement Perception Neuronal Mechanisms and Cognitive Aging written by Michael Simon Jacob and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-movement creates a radial pattern of optic flow that tells us where we are going. Recent studies have shown that the processing of visual motion is actively controlled by frontal-parietal cortical networks to satisfy the demands of ongoing behavior. Navigation-related visual motion perceptual deficits in aging and Alzheimer's disease (AD) suggest a systems level disruption of optic flow processing in these conditions. We have now examined this system using human evoked potentials and probed the underlying neuronal mechanisms using monkey single neuron physiology. In our studies of aging and AD, we combine a continuous visual discrimination task with simultaneous visual motion and word stimulus streams to assess task effects on stimulus evoked cortical activity. We find that the cognitive control of motion and word processing are fundamentally different in aging and AD. Impairments in verbal fluency among our AD patients and impairments in optic flow perceptual thresholds among our older adult subjects are associated with selective reductions in cortical responsiveness to word and optic flow stimuli, respectively. Thus, diagnostic criteria for AD may not appropriately consider impairments in visuospatial processing. Monkeys trained in a memory guided steering task show single neurons with task-dependent optic flow processing in cortical areas MST and LIP. One third of MST neurons show task effects on basic neuronal response properties. In contrast, LIP neurons show minimal optic flow stimulus selectivity but pronounced task effects on their responses. Both MST and LIP show evidence of cognitive signals related to motor planning just prior to steering. These results suggest that posterior parietal cortical areas form a distributed network which is dynamically shaped by task demands. Despite species and methodological differences, the dynamics of cortical activity in humans and monkeys show sensory signals that are followed shortly by cognitive signals to actively modulate self-movement perception. In young adult human subjects and monkey single neurons, we see obligate optic flow processing in all task conditions. In older adult humans, we see a loss of obligate optic flow responsiveness which may suggest a selective vulnerability of visuospatial processing networks in cognitive aging.
Download or read book Cognitive Aging written by Institute of Medicine and published by National Academies Press. This book was released on 2015-07-21 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: For most Americans, staying "mentally sharp" as they age is a very high priority. Declines in memory and decision-making abilities may trigger fears of Alzheimer's disease or other neurodegenerative diseases. However, cognitive aging is a natural process that can have both positive and negative effects on cognitive function in older adults - effects that vary widely among individuals. At this point in time, when the older population is rapidly growing in the United States and across the globe, it is important to examine what is known about cognitive aging and to identify and promote actions that individuals, organizations, communities, and society can take to help older adults maintain and improve their cognitive health. Cognitive Aging assesses the public health dimensions of cognitive aging with an emphasis on definitions and terminology, epidemiology and surveillance, prevention and intervention, education of health professionals, and public awareness and education. This report makes specific recommendations for individuals to reduce the risks of cognitive decline with aging. Aging is inevitable, but there are actions that can be taken by individuals, families, communities, and society that may help to prevent or ameliorate the impact of aging on the brain, understand more about its impact, and help older adults live more fully and independent lives. Cognitive aging is not just an individual or a family or a health care system challenge. It is an issue that affects the fabric of society and requires actions by many and varied stakeholders. Cognitive Aging offers clear steps that individuals, families, communities, health care providers and systems, financial organizations, community groups, public health agencies, and others can take to promote cognitive health and to help older adults live fuller and more independent lives. Ultimately, this report calls for a societal commitment to cognitive aging as a public health issue that requires prompt action across many sectors.
Download or read book The Cerebellum and Cognition written by and published by Academic Press. This book was released on 1997-10-02 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cerebellum and Cognition pulls together a preeminent group of authors. The cerebellum has been previously considered as a highly complex structure involved only with motor control. The cerebellum is essential to nonmotor functions, and recent research has revealed new medically important roles of the cerebellum and cognitive processes. - Selected for inclusion in Doody's Core Titles 2013, an essential collection development tool for health sciences libraries - Comprehensive coverage of cerebellum in motor control and cognition - New developments regarding the cerebellum and motor systems - Therapeutic implications of cerebellar contributions to cognition - Preeminent group of contributors
Download or read book Cognitive Aging written by Denise Park and published by Psychology Press. This book was released on 2012-12-06 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: As our society ages, the topic of cognitive aging is becoming increasingly important. This volume provides an accessible overview of how the cognitive system changes as a function of normal aging. Building on the successful first edition, this volume provide an even more comprehensive coverage of the major issues affecting memory, attention, language, speech and other aspects of cognitive functioning. The essential chapters from the first edition have been thoroughly revised and updated and new chapters have been introduced which draw in neuroscience studies and more applied topics. In addition, contributors were encouraged to ensure their chapters are accessible to students studying the topic for the first time. This therefore makes the volume appealing as a textbook on senior undergraduate and graduate courses.
Download or read book The brain meets the body Neural basis of cognitive contribution in movement for healthy and neurological populations written by Daniela De Bartolo and published by Frontiers Media SA. This book was released on 2023-11-06 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Cognitive Neuroscience of Working Memory written by Naoyuki Osaka and published by . This book was released on 2007 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is only relatively recently that it has been possible to study the neural processes that might underlie working memory, leading to a proliferation of research in this domain. This volume brings together leading researchers from around the world to summarise current knowledge of this field.
Download or read book Research Awards Index written by and published by . This book was released on 1989 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neural Plasticity and Memory written by Federico Bermudez-Rattoni and published by CRC Press. This book was released on 2007-04-17 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, multidisciplinary review, Neural Plasticity and Memory: From Genes to Brain Imaging provides an in-depth, up-to-date analysis of the study of the neurobiology of memory. Leading specialists share their scientific experience in the field, covering a wide range of topics where molecular, genetic, behavioral, and brain imaging techniq
Download or read book Motor Cognition written by Marc Jeannerod and published by Oxford University Press. This book was released on 2006-06-29 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our ability to acknowledge and recognize our own identity -- our "self" -- is a characteristic doubtless unique to humans. Where does this feeling come from? How does the combination of neurophysiological processes coupled with our interaction with the outside world construct this coherent identity? We know that our social interactions contribute via the eyes, ears, etc. However, our self is not only influenced by our senses. It is also influenced by the actions we perform and those we see others perform. Our brain anticipates the effects of our own actions and simulates the actions of others. In this way, we become able to understand ourselves and to understand the actions and emotions of others. This book describes the new field of "Motor Cognition". Though motor actions have long been studied by neuroscientists and physiologists, it is only recently that scientists have considered the role of actions in building the self. How consciousness of action is part of self-consciousness, how one's own actions determine the sense of being an agent, how actions performed by others impact on ourselves for understanding others, differentiating ourselves from them and learning from them: these questions are raised and discussed throughout the book, drawing on experimental, clinical, and theoretical bases. The advent of new neuroscience techniques, such as neuroimaging and direct electrical brain stimulation, together with a renewal of behavioral methods in cognitive psychology, provide new insights into this area. Mental imagery of action, self-recognition, consciousness of actions, imitation can be objectively studied using these new tools. The results of these investigations shed light on clinical disorders in neurology, psychiatry, and in neuro-development.
Download or read book Biomedical Index to PHS supported Research pt A Subject access A H written by and published by . This book was released on 1992 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Timing and Time Perception Procedures Measures Applications written by and published by BRILL. This book was released on 2018-04-10 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Timing and Time Perception: Procedures, Measures, and Applications is a one-of-a-kind, collective effort to present the most utilized and known methods on timing and time perception. Specifically, it covers methods and analysis on circadian timing, synchrony perception, reaction/response time, time estimation, and alternative methods for clinical/developmental research. The book includes experimental protocols, programming code, and sample results and the content ranges from very introductory to more advanced so as to cover the needs of both junior and senior researchers. We hope that this will be the first step in future efforts to document experimental methods and analysis both in a theoretical and in a practical manner. Contributors are: Patricia V. Agostino, Rocío Alcalá-Quintana, Fuat Balcı, Karin Bausenhart, Richard Block, Ivana L. Bussi, Carlos S. Caldart, Mariagrazia Capizzi, Xiaoqin Chen, Ángel Correa, Massimiliano Di Luca, Céline Z. Duval, Mark T. Elliott, Dagmar Fraser, David Freestone, Miguel A. García-Pérez, Anne Giersch, Simon Grondin, Nori Jacoby, Florian Klapproth, Franziska Kopp, Maria Kostaki, Laurence Lalanne, Giovanna Mioni, Trevor B. Penney, Patrick E. Poncelet, Patrick Simen, Ryan Stables, Rolf Ulrich, Argiro Vatakis, Dominic Ward, Alan M. Wing, Kieran Yarrow, and Dan Zakay.
Download or read book Human Movement and Motor Control in the Natural Environment written by Peter A Federolf and published by Frontiers Media SA. This book was released on 2023-06-08 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: The basic understanding of human movement and control of human movement stems largely from laboratory measurements where human movement can be quantified with high precision and accuracy, but where the artificial environment compromises ecological validity. A good example for this issue was demonstrated in a recent investigation; specifically that the walking gait pattern of healthy individuals in a laboratory changed as a function of how many researchers were present during the experiment. Observations like these underscore that study volunteers adapt their behavior to the specific laboratory environment and warrant the question of how well we can transfer our lab-based understanding of gait patterns and the underlying neuromuscular control system to walking during daily living. Another research area where lab-based movement assessments have led to conflicting findings is the field of sports injury prevention: Many neuromuscular training programs have been shown to be effective in reducing the sport injury rate in athletes by 30-50% or more in a variety of different multi-directional sports. Nevertheless, lab-based assessments of the same athletes who completed those training programs were often not able to detect improvements in motor control of sport-specific movements or a reduction in joint loading, two factors thought to be closely linked with sport injury risk. This disconnect suggests that lab-based assessments of movement and motor control are often poor indicators of player behavior during real-game scenarios and may limit our ability to screen athletes for injury risk or monitor their progress in rehabilitation. These examples highlight that we should strive for the assessment and investigation of human movement and motor control in natural environments, i.e. where individuals, patients, athletes, or other groups of interest perform, explore, and interact under real-world conditions.
Download or read book Active Inference written by Thomas Parr and published by MIT Press. This book was released on 2022-03-29 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive treatment of active inference, an integrative perspective on brain, cognition, and behavior used across multiple disciplines. Active inference is a way of understanding sentient behavior—a theory that characterizes perception, planning, and action in terms of probabilistic inference. Developed by theoretical neuroscientist Karl Friston over years of groundbreaking research, active inference provides an integrated perspective on brain, cognition, and behavior that is increasingly used across multiple disciplines including neuroscience, psychology, and philosophy. Active inference puts the action into perception. This book offers the first comprehensive treatment of active inference, covering theory, applications, and cognitive domains. Active inference is a “first principles” approach to understanding behavior and the brain, framed in terms of a single imperative to minimize free energy. The book emphasizes the implications of the free energy principle for understanding how the brain works. It first introduces active inference both conceptually and formally, contextualizing it within current theories of cognition. It then provides specific examples of computational models that use active inference to explain such cognitive phenomena as perception, attention, memory, and planning.
Download or read book How Healthy Are We written by Orville Gilbert Brim and published by University of Chicago Press. This book was released on 2004-01-15 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: Childhood, adolescence, even the "twilight years" have been extensively researched and documented. But the vast terrain known as midlife—the longest segment of the life course—has remained uncharted. How physically and psychologically healthy are Americans at midlife? And why do some experience greater well-being than others? The MacArthur Foundation addressed these questions head-on by funding a landmark study known as "Midlife in the U.S.," or MIDUS. For the first time in a single study, researchers were able to integrate epidemiological, sociological, and psychological assessments, as well as innovative new measures to evaluate how work and family life influence each other. How Healthy Are We? presents the key findings from the survey in three sections: physical health, quality of life and psychological well-being, and the contexts (family, work) of the midlife. The topics covered by almost forty scholars in a wide variety of fields are vast, including everything from how health and well-being vary with socioeconomic standing, gender, race, or region of the country to how middle-aged people differ from younger or older adults in their emotional experience and quality of life. This health—the study measures not only health-the absence of illness—but also reports on the presence of wellness in middle-aged Americans. The culmination of a decade and a half of research by leading scholars, How Healthy Are We? will dramatically alter the way we think about health in middle age and the factors that influence it. Researchers, policymakers, and others concerned about the quality of midlife in contemporary America will welcome its insights. * Having a good life means having good relationships with others to almost 70% of those surveyed. Less than 40% mentioned their careers. * Reports of disruptive daily stressors vary by age, with young adults and those in midlife experiencing more than those in later adulthood. * Men have higher assessments of their physical and mental health than woman until the age of 60.
Download or read book Research Grants Index written by National Institutes of Health (U.S.). Division of Research Grants and published by . This book was released on 1973 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Sense of Agency written by Patrick Haggard and published by Oxford University Press. This book was released on 2015-08-27 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agency has two meanings in psychology and neuroscience. It can refer to one's capacity to affect the world and act in line with one's goals and desires--this is the objective aspect of agency. But agency can also refer to the subjective experience of controlling one's actions, or how it feels to achieve one's goals or affect the world. This subjective aspect is known as the sense of agency, and it is an important part of what makes us human. Interest in the sense of agency has exploded since the early 2000s, largely because scientists have learned that it can be studied objectively through analyses of human judgment, behavior, and the brain. This book brings together some of the world's leading researchers to give structure to this nascent but rapidly growing field. The contributors address questions such as: What role does agency play in the sense of self? Is agency based on predicting outcomes of actions? And what are the links between agency and motivation? Recent work on the sense of agency has been markedly interdisciplinary. The chapters collected here combine ideas and methods from fields as diverse as engineering, psychology, neurology, neuroscience, and philosophy of mind, making the book a valuable resource for any student or researcher interested in action, volition, and exploring how mind and brain are organized.
Download or read book Visual Mismatch Negativity vMMN a Prediction Error Signal in the Visual Modality written by Gabor Stefanics and published by Frontiers Media SA. This book was released on 2015-06-04 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current theories of visual change detection emphasize the importance of conscious attention to detect unexpected changes in the visual environment. However, an increasing body of studies shows that the human brain is capable of detecting even small visual changes, especially if such changes violate non-conscious probabilistic expectations based on repeating experiences. In other words, our brain automatically represents statistical regularities of our visual environmental. Since the discovery of the auditory mismatch negativity (MMN) event-related potential (ERP) component, the majority of research in the field has focused on auditory deviance detection. Such automatic change detection mechanisms operate in the visual modality too, as indicated by the visual mismatch negativity (vMMN) brain potential to rare changes. VMMN is typically elicited by stimuli with infrequent (deviant) features embedded in a stream of frequent (standard) stimuli, outside the focus of attention. In this research topic we aim to present vMMN as a prediction error signal. Predictive coding theories account for phenomena such as mismatch negativity and repetition suppression, and place them in a broader context of a general theory of cortical responses. A wide range of vMMN studies has been presented in this Research Topic. Twelve articles address roughly four general sub-themes including attention, language, face processing, and psychiatric disorders. Additionally, four articles focused on particular subjects such as the oblique effect, object formation, and development and time-frequency analysis of vMMN. Furthermore, a review paper presented vMMN in a hierarchical predictive coding framework. Each paper in this Research Topic is a valuable contribution to the field of automatic visual change detection and deepens our understanding of the short term plasticity underlying predictive processes of visual perceptual learning.
