Multisensory Integration In Spatial Orientation And Self Motion Perception
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Multisensory Integration In Spatial Orientation And Self Motion Perception
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Author :
language : en
Publisher:
Release Date : 2015
Multisensory Integration In Spatial Orientation And Self Motion Perception 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.
Multisensory Perception Of Spatial Orientation And Self Motion
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Author : K. N. de Winkel
language : en
Publisher:
Release Date : 2013
Multisensory Perception Of Spatial Orientation And Self Motion written by K. N. de Winkel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Age Related Changes In Multisensory Self Motion Perception
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Author : Robert Charles Ramkhalawansingh
language : en
Publisher:
Release Date : 2018
Age Related Changes In Multisensory Self Motion Perception written by Robert Charles Ramkhalawansingh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
To derive the precise estimates of self-motion necessary to perform mobility-related tasks like walking and driving, humans integrate information about their movement from across their sensory systems (e.g. visual, auditory, proprioceptive, vestibular). However, recent evidence suggests that the way in which multiple sensory inputs are integrated by the adult brain changes with age. The objective of this thesis was to consider, for the first time, whether age-related changes in multisensory integration are observed in the context of self-motion perception. Two research approaches were used. First, I used a simple, simulated driving task to provide visual cues to self-motion and to manipulate the availability of auditory and/or vestibular cues to self-motion (i.e., unisensory versus multisensory conditions). The results revealed that relative to younger adults, older adults generally demonstrate greater differences in performance between multisensory and unisensory conditions. However, the driving task could not disentangle the effects of age-related differences in real-world driving experience from age-related differences in sensory integrative mechanisms. Second, I used an established and highly controlled psychophysical heading perception task to evaluate whether, like younger adults, older adults integrate visual and vestibular cues to self-motion in a statistically optimal fashion. I considered conditions where each of the two cues was presented alone, in combination and congruent, or in combination but indicating conflicting heading angles. Results showed that while older adults did demonstrate optimal integration during congruent conditions, they were comparatively less tolerant to spatial conflicts between the visual and vestibular inputs. Overall, these results may have important implications for the way that older adults perform mobility-related tasks under various perceptual and environmental conditions.
Vestibular Cognition
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Author :
language : en
Publisher: BRILL
Release Date : 2017-03-06
Vestibular Cognition written by and has been published by BRILL this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-03-06 with Psychology categories.
This volume presents a collection of studies and reviews that confirm the vestibular system’s fundamental and hitherto largely unsuspected role in almost all aspects of cognition.
Multisensory Integration In Spatial Orientation
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Author : Maaike de Vrijer
language : en
Publisher:
Release Date : 2010
Multisensory Integration In Spatial Orientation written by Maaike de Vrijer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Updates On Multisensory Perception From Neurons To Cognition
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Author : Angelo Maravita
language : en
Publisher: Frontiers E-books
Release Date :
Updates On Multisensory Perception From Neurons To Cognition written by Angelo Maravita and has been published by Frontiers E-books this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
In recent years there has been a dramatic progress in understanding how stimuli from different sensory modalities are integrated among each other. Multisensory integration results in a unitary representation of the world that strongly characterizes perception and cognition in humans. Knowledge about multi sensory integration has research techniques and approaches, including neurophysiology, experimental psychology, neuropsychology, neuroimaging, and computational modelling. This special issue aims at presenting an up-to-date integrative overview of the physiological, psychological, developmental, and functional processes associated with multisensory integration. The proposed collection of papers is organized thematically into sections, each featuring a state-of-the-art review of key themes in multisensory research, from more approaches in the animal, to the study of multisensory perception and cognition in humans. Specifically, this special issue will consider: The physiological mechanisms of multisensory processing in cortical and subcortical brain structures of model animal species, (rat, cat, and monkey); current biologically inspired computational modelling of multisensory integration; evidence about the multisensory contributions to perception in humans, as highlighted by psychophysical and neuropsychological evidence; the neural basis of multisensory processing in the human brain uncovered by recent neuroimaging techniques, including EEG, PET, fMRI; the consequences of the breakdown of normal sensory integration as shown by studies with techniques of brain stimulation in humans; developmental processes of multisensory perception in humans and the constrains for the emergence of multisensory processes in relation to sensory experience; the issue of crossmodal neuroplasticity concerning behavioral and neural changes following sensory deprivation. The challenge of this Research Topic is to provide an interdisciplinary context allowing to understand the basic principles of multisensory integration in humans and the key issues that this fascinating field of study rises for future research.
Neural Mechanisms Of Multisensory Cue Integration For Self Motion Perception
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Author : Christopher Robert Fetsch
language : en
Publisher:
Release Date : 2009
Neural Mechanisms Of Multisensory Cue Integration For Self Motion Perception written by Christopher Robert Fetsch 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 Cue Integration
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Author : Julia Trommershauser
language : en
Publisher: Oxford University Press
Release Date : 2011-09-21
Sensory Cue Integration written by Julia Trommershauser 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 2011-09-21 with Psychology categories.
This book is concerned with sensory cue integration both within and between sensory modalities, and focuses on the emerging way of thinking about cue combination in terms of uncertainty. These probabilistic approaches derive from the realization that our sensors are noisy and moreover are often affected by ambiguity. For example, mechanoreceptor outputs are variable and they cannot distinguish if a perceived force is caused by the weight of an object or by force we are producing ourselves. The probabilistic approaches elaborated in this book aim at formalizing the uncertainty of cues. They describe cue combination as the nervous system's attempt to minimize uncertainty in its estimates and to choose successful actions. Some computational approaches described in the chapters of this book are concerned with the application of such statistical ideas to real-world cue-combination problems. Others ask how uncertainty may be represented in the nervous system and used for cue combination. Importantly, across behavioral, electrophysiological and theoretical approaches, Bayesian statistics is emerging as a common language in which cue-combination problems can be expressed.
Motion Perception With Conflicting Or Congruent Visual And Vestibular Cues
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Author : Andrew Alan Rader
language : en
Publisher:
Release Date : 2009
Motion Perception With Conflicting Or Congruent Visual And Vestibular Cues written by Andrew Alan Rader 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.
Introduction: We are required on a daily basis to estimate our position and motion in space by centrally combining noisy, incomplete, and potentially conflicting or ambiguous, information from both sensory sources (e.g. vestibular organs, visual, proprioceptive), and non-sensory sources (e.g. efferent copy, cognition)). This "spatial orientation" is normally subconscious, and information from multiple sense organs is automatically fused into perception. As late as the early nineteenth century, very little was known about the underlying mechanisms, and our understanding of some critical factors such as such as how the brain resolves the tilt-translation ambiguity is only now beginning to be understood. The otolith organs function like a three-axis linear accelerometer, responding to the vector difference between gravity and linear acceleration (GIF= g - a). How does the brain separate gravity from linear acceleration? How does the brain combine cues from disparate sensors to derive an overall perception of motion? What happens if these sensors provide conflicting information? Humans routinely perform balance tasks on a daily basis, sometimes in the absence of visual cues. The inherent complexity of the tasks is evidenced by the wide range of balance pathologies and locomotive difficulties experienced by people with vestibular disorders. Maintaining balance involves stabilizing the body's inverted pendulum dynamics where the center of rotation (at the ankles) is below the center of mass and the vestibular sensors are above the center of rotation (for example, swaying above the ground level or balancing during standing or walking). This type of swing motion is also encountered in most fixed-wing aircraft and flight simulators, where the pilot is above the center of roll. Swing motions where the center of mass and sensors are below the center of rotation are encountered on a child's swing, and in some high-wing aircraft and helicopters. Spatial orientation tasks requiring central integration of sensory information are ubiquitous in aerospace. Spatial disorientation, often triggered by unusual visual or flight conditions, is attributed to around 10% of aviation accidents, and many of these are fatal. Simulator training is a key factor in establishing the supremacy of instrument-driven flight information over vestibular and other human sensory cues in the absence of reliable visual information. It therefore becomes important to ensure that simulators re-create motion perceptions as accurately as possible. What cues can safely be ignored or replaced with analogous cues? How realistic and consistent must a visual scene be to maintain perceptual fidelity? Spatial orientation is also a critical human factor in spaceflight. Orientation and navigation are impaired by the lack of confirming gravitation cues in microgravity, as sensory cues are misinterpreted and generate the incorrect motion perceptions. These persist at least until the vestibular or central nervous system pathways adapt to the altered gravity environment, however human navigation never fully adapts to the three dimensional frame. There is a wealth of data describing the difficulties with balance, gait, gaze control, and spatial orientation on return to Earth. Post-flight ataxia (a neurological sign of gross incoordination of motor movements) is a serious concern for all returning space travelers for at least ten days. This would be an even more serious concern for newly arrived astronauts conducting operations extraterrestrial environments after a long space flight. What motion profiles in a lunar landing simulator on Earth will best prepare astronauts for the real task in an altered gravity environment? Far from being a problem restricted to a human operator, the aerospace systems themselves face the same challenge of integrating sensory information for navigation. Modeling how the brain performs multi-sensory integration has analogies to how aircraft and spacecraft perform this task, and in fact modelers have employed similar techniques. Thus, developments in modeling multi-sensory integration improve our understanding of both the operator and the vehicle. Specifically, this research is concerned with how human motion perception is affected during swing motion when vestibular information is incomplete or ambiguous, or when conflicting visual information is provided.
Multisensory Integration In Speech And Motion Perception
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Author : Lars Arne Ross
language : en
Publisher:
Release Date : 2008
Multisensory Integration In Speech And Motion Perception written by Lars Arne Ross and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Perception categories.