A Model of Cat Primary Visual Cortex and Its Thalamic Input PDF Download
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Author: Anton E. Krukowski
Publisher:
ISBN:
Category :
Languages : en
Pages : 382
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Book Description
Author: Anton E. Krukowski
Publisher:
ISBN:
Category :
Languages : en
Pages : 382
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Book Description
Author: Bertram Payne
Publisher: Academic Press
ISBN: 0080525326
Category : Medical
Languages : en
Pages : 733
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Book Description
Written by experts on the forefront of investigations of brain function, vision, and perception, the material presented is of an unparalleled scientific quality, and shows that analyses of enormous breadth and sophistication are required to probe the structure and function of brain regions. The articles are highly persuasive in showing what can be achieved by carrying out careful and imaginative experiments. The Cat Primary Visual Cortex should emerge as essential reading for all those interested in cerebral cortical processing of visual signals or researching or working in any field of vision. Comprehensive account of cat primary visual cortex Generous use of illustrations including color Covers research from structure to connections to functions Chapters by leaders in the field Topics presneted on multiple, compatible levels
Author: Sooyoung Chung
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The result indicated that the input from thalamic afferents to a layer 4 simple cell is (1) proportionately larger (37--46%) than what is assumed by many anatomical studies, and (2) tuned in orientation as sharp as the total synaptic input, as suggested by Hubel and Wiesel (1962). The thalamic afferents, therefore, appear to not only shape the receptive field of layer 4 simple cells of the cat striate cortex, but also account for their sharp orientation selectivity.
Author: Helga Kolb
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Paul Bush
Publisher:
ISBN:
Category :
Languages : en
Pages : 322
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Author: Gordon M. Shepherd
Publisher: Oxford University Press
ISBN: 0190636114
Category : Medical
Languages : en
Pages : 625
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Book Description
In order to focus on principles, each chapter in this work is brief, organized around 1-3 wiring diagrams of the key circuits, with several pages of text that distil the functional significance of each microcircuit
Author: David Rose
Publisher: John Wiley & Sons
ISBN:
Category : Medical
Languages : en
Pages : 616
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Book Description
A comprehensive and stimulating study which presents the views of 71 leading theorists on the underlying mechanisms and functions of the primary visual cortex.
Author: Jon H. Kaas
Publisher: CRC Press
ISBN: 0203507592
Category : Medical
Languages : en
Pages : 439
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Book Description
The last 20 years of research have been marked by exceptional progress in understanding the organization and functions of the primate visual system. This understanding has been based on the wide application of traditional and newly emerging methods for identifying the functionally significant subdivisions of the system, their interconnections, the
Author: Jeffery A. Winer
Publisher: Springer Science & Business Media
ISBN: 1441900748
Category : Science
Languages : en
Pages : 711
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Book Description
There has been substantial progress in understanding the contributions of the auditory forebrain to hearing, sound localization, communication, emotive behavior, and cognition. The Auditory Cortex covers the latest knowledge about the auditory forebrain, including the auditory cortex as well as the medial geniculate body in the thalamus. This book will cover all important aspects of the auditory forebrain organization and function, integrating the auditory thalamus and cortex into a smooth, coherent whole. Volume One covers basic auditory neuroscience. It complements The Auditory Cortex, Volume 2: Integrative Neuroscience, which takes a more applied/clinical perspective.
Author: Bruno Oliveira Ferreira de Souza
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Signals from the retina are relayed to the lateral geniculate nucleus from which they are sent to the primary visual cortex. At the cortical level, the information is transferred across several visual areas in which the complexity of the processing increases progressively. Anatomical and functional evidence demonstrate the existence of two main pathways in visual cortex processing distinct features of the visual information: the dorsal and ventral streams. Cortical areas composing the dorsal stream are implicated mostly in motion processing while those comprising the ventral stream are involved in the processing of form and colour. This classic view of the cortical functional organization is challenged by the existence of reciprocal connections of visual cortical areas with the thalamic nucleus named pulvinar. These connections allow the creation of a trans-thalamic pathway that parallels the cortico-cortical communications across the visual hierarchy. The main goal of the present thesis is twofold: first, to obtain a better comprehension of the processing of light increments and decrements in an area of the cat ventral stream (area 21a); second, to characterize the nature of the thalamo-cortical inputs from the cat lateral posterior nucleus (LP) to area 21a. In study #1, we investigated the spatiotemporal response profile of neurons from area 21a to light increments (brights) and decrements (darks) using a reverse correlation analysis of a sparse noise stimulus. Our findings showed that 21a neurons exhibited stronger responses to darks with receptive fields exhibiting larger dark subfields. However, no differences were found between the temporal dynamics of brights and darks. In comparison with the primary visual cortex, the dark preference in area 21a was found to be strongly enhanced, supporting the notion that the asymmetries between brights and darks are transmitted and amplified along the ventral stream. In study #2, we investigated the impact of the reversible pharmacological inactivation of the LP nucleus on the contrast response function (CRF) of neurons from area 21a and the primary visual cortex (area 17). The thalamic inactivation yielded distinct effects on both cortical areas. While in area 17 the LP inactivation caused a slight decrease in the response gain, in area 21a a strong increase was observed. Thus, our findings suggest that the LP exerts a modulatory influence on the cortical processing along the ventral stream with stronger impact on higher order extrastriate areas. Taken together, our findings allowed a better comprehension of the functional properties of the cat ventral stream and contributed to the current knowledge on the role of the pulvinar on the cortico-thalamo-cortical processing of visual information.
