Localization Capabilities Of Vep Source Localization And Functional Magnetic Resonance Imaging In Human Visual Cortex
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Localization Capabilities Of Vep Source Localization And Functional Magnetic Resonance Imaging In Human Visual Cortex
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Author : Suzanne Lyn Baker
language : en
Publisher:
Release Date : 2003
Localization Capabilities Of Vep Source Localization And Functional Magnetic Resonance Imaging In Human Visual Cortex written by Suzanne Lyn Baker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Using Multi Stimulus Vep Source Localization To Obtain A Detailed Retinotopic Map Of Human Primary Visual Cortex
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Author : Scott David Slotnick
language : en
Publisher:
Release Date : 1998
Using Multi Stimulus Vep Source Localization To Obtain A Detailed Retinotopic Map Of Human Primary Visual Cortex written by Scott David Slotnick and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Localization And Identification Of Functional Regions Within The Human Visual System
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Author : Vincent P. Clark
language : en
Publisher:
Release Date : 1993
Localization And Identification Of Functional Regions Within The Human Visual System written by Vincent P. Clark and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Mapping Human Primary Visual Cortex With Functional Magnetic Resonance Imaging
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Author : Stephen A. Engel
language : en
Publisher:
Release Date : 1994
Mapping Human Primary Visual Cortex With Functional Magnetic Resonance Imaging written by Stephen A. Engel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Cumulated Index Medicus
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Author :
language : en
Publisher:
Release Date : 2000
Cumulated Index Medicus written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Medicine categories.
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 2004
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Dissertations, Academic categories.
Resting State Functional Connectivity At Human Visual Cortex Revealed By Fast Functional Magnetic Resonance Imaging
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Author : 李輅毅
language : en
Publisher:
Release Date : 2014
Resting State Functional Connectivity At Human Visual Cortex Revealed By Fast Functional Magnetic Resonance Imaging written by 李輅毅 and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Fine Scale Spatial Organization Of Face And Limb Selective Regions In Human High Level Visual Cortex
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Author : Kevin Sean Weiner
language : en
Publisher:
Release Date : 2011
Fine Scale Spatial Organization Of Face And Limb Selective Regions In Human High Level Visual Cortex written by Kevin Sean Weiner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Neurophysiology and optical imaging studies in monkeys and functional magnetic resonance imaging (fMRI) studies in both monkeys and humans have localized clustered neural responses in high-level visual cortex selective for images of biologically relevant categories such as faces and limbs. Implementing higher resolution (1.5mm voxels) fMRI scanning methods than prior studies (3-5mm voxels), the results reported in this dissertation illustrate a topographic organization of face- and limb-selective regions in adjacent and alternating clusters in both ventral temporal and lateral occipitotemporal cortices. Region of interest analyses in a series of experiments indicate distinct category and position sensitivities within these clusters and multivoxel pattern analyses indicate different amounts of information in highly-, weakly-, and non-selective voxels for these categories. These results mediate the debate between modular and distributed theories of high-level visual cortex, as well as support a novel, sparsely-distributed organization including both locally clustered and distributed elements for face and limb representations. These results also reveal two new basic organization principles of high-level visual cortex where there is both a consistency in the anatomical location of functional regions, as well as a preserved spatial relationship among functional regions. Employing these two principles enables the first framework for consistent parcellation of high-level visual regions outside of retinotopic cortex. Importantly, this framework can also be applied to other sensory and nonsensory cortical systems.
From Photons To Photos
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Author : Daniel E. Berman
language : en
Publisher:
Release Date : 2015
From Photons To Photos written by Daniel E. Berman 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.
Immense strides in furthering our understanding of a variety of underlying mechanisms involved in visual perception are continuously being made, however numerous questions in the field remain unanswered. Detailed here are two studies aimed at elucidating the functional processes in which the human visual system integrates visual stimuli into cohesive representations of the world around us. First, using simulations and fMRI experiments we examined how retinotopic mapping paradigms can be optimized to most efficaciously and accurately measure the underlying functional and organizational properties of early to mid-level visual cortex in both healthy and clinical populations. We focused on quantitatively comparing two common retinotopic mapping designs in terms of measurable and achievable signal-to-noise ratios under various conditions such as exogenous noise and scanning time. While multifocal retinotopy can yield a higher signal-to-noise ratio in primary visual cortex, we find that the phase-encoded technique provides qualitatively better retinotopic maps despite having a less robust point-to-point correspondence of visual field location to visual cortex. Other implications of employing these methods are also discussed. Next, fMRI experiments aimed at uncovering the spatial frequency tuning profiles of higher-level, category selective areas of cortex such as the parahippocampal place area (PPA), retrospenial cortex (RSC), occipital place area (OPA), lateral occipital cortex (LOC) and the fusiform face area (FFA) were performed. These experiments utilized both frequency filtered scenes belonging to four different categories along with unstructured stimuli of various spatial frequencies. Results from univariate, multivariate and searchlight analyses are subsequently provided and elaborated on, with the general finding that the category selective areas mentioned above are sensitive to high spatial frequencies, especially when semantic information is present.
Natural Image Coding In Early Visual Areas
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Author : Cheryl Annette Olman
language : en
Publisher:
Release Date : 2003
Natural Image Coding In Early Visual Areas written by Cheryl Annette Olman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Magnetic resonance imaging categories.