Author: Wolf Krebs
Publisher: Springer Science & Business Media
ISBN: 1461390958
Category : Medical
Languages : en
Pages : 178
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Book Description
Contents Introduction .......................................... . 1 The Primate Eye ...................................... . 2 Embryology of Retina and Choroid ....................... . 4 Microscopic Anatomy .................................. . 4 Retina ............................................ . 4 Choroid ........................................... . 8 Material and Methods .................................. . 10 Fine Structure of the Retina 14 RetinaI Pigment Epithelium ............................. . 16 Photoreceptor Cells ................................... . 30 Outer Plexiform Layer and Horizontal Cells .................. . 64 Bipolar, Radial Clial, and Amacrine Cells .................... . 76 Canglion Cells and InternaI Limiting Membrane ............... . 98 Spatial Density of RetinaI Cells .......................... . 112 Fine Structure of the Choroid ........................... . 116 Choroidocapillaris and Its Fiber System ..................... . 118 Arteries, Veins, and Lymphatic Spaces ...................... . 134 Choroidal Nerves .................................... . 142 Cells of Choroidal Connective Tissue ....................... . 148 References ........................................... . 153 Index ................................................ . 157 vii This volume describes the morphology of the primate re tina as seen with the electron microscope. As it is an atlas, the electron micrographs are its most In trad lietian important part. The text accompanies the figures, highlighting selected topics either to explain structures or to point out structure-function relation ships. A scholarly review of the whole spectrum of research on the re tina and choroid is not feasible in a single volume. Thus, whenever available, review artides or monographs, rather than original work, are cited for reference.
Author: Wolf Krebs
Publisher: Springer
ISBN:
Category : Medical
Languages : en
Pages : 176
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Book Description
Author: E. Zrenner
Publisher: Springer Science & Business Media
ISBN: 3642876064
Category : Medical
Languages : en
Pages : 235
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Book Description
"To explain all nature is too difficult a task for anyone man or even for anyone age. Tis much better to do a little with certainty, and leave the rest for others that come after you, than to explain all things ... " Sir Isaac Newton (1642-1727) This book describes and discusses some new aspects of col or vision in primates which have emerged from a series of experiments conducted over the past 8 years both on single ganglion cells in monkey retina and on the visually evoked cortical potential in man: corresponding psychophysical mechanisms of human perception will be considered as well. An attempt will be made to better understand the basic mechanisms of color vision using a more comprehensive approach which takes into account new mechanisms found in single cells and relates them to those found valid for the entire visual system. The processing of color signals was followed up from the retina to the visual cortex and to the percepq.tal centers, as far as the available techniques permitted.
Author: Helga Kolb
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Jan Kremers
Publisher: John Wiley & Sons
ISBN: 0470868104
Category : Science
Languages : en
Pages : 382
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Book Description
Many recent developments in the field in recording, staining, genetic and stimulation techniques, in vivo, and in vitro have significantly increased the amount of available data on the primate visual system. Written with contributions from key neurobiologists in the field, The Primate Visual System will provide the reader with the latest developments, examining the structure, function and evolution of the primate visual system. The book takes a comparative approach as a basis for studying the physiological properties of primate vision and examines the phylogenetic relationship between the visual systems of different primate species. Taken from a neurobiologist’s perspective this book provides a unique approach to the study of primate vision as a basis for further study into the human visual system. Altogether an important overview of the structure, function and evolution of the primate visual system from a neurobiologist’s perspective, written specifically for higher level undergraduate and graduate students taking courses in neuroscience, physiology, optics/ visual science, as well as a valuable read to researchers new to the field.
Author: Tricia L. Chan
Publisher:
ISBN:
Category : Retina
Languages : en
Pages : 172
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Book Description
Author: Robert William Hammon
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
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Book Description
Author: Colleen Elizabeth Rhoades
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The retina provides the sole source of visual information to the brain, yet the signal from the retina is only partially understood. In primates, there are ~20 types of output cells of the retina, called retinal ganglion cells, with each type extracting specific information about the visual scene and projecting to distinct targets in the brain. The five numerically dominant retinal ganglion cell types have been extensively studied, but much less is known about the computations of the remaining ganglion cell types. To understand the visual function of the retina in health and in disease, it is necessary to understand how distinctive signals in the diverse retinal ganglion cell types emerge within retinal circuits, and how they collectively encode visual inputs. This thesis explores the physiological properties of the low-density ganglion cell types. In total, large-scale multi-electrode recordings revealed the responses of 12 retinal ganglion cell types, each with distinctive spatial, temporal, and chromatic properties. Focusing on the ON and OFF smooth monostratified cell types, strikingly irregular receptive field structure composed of spatially segregated hotspots were observed, quite different from the classical view of retinal receptive fields. Direct visual stimulation and computational inference demonstrate strong nonlinearities in the retinal circuit which contribute to receptive field hotspots. Surprisingly, visual stimulation of different hotspots produced subtly different extracellular spike waveforms in the same cell, consistent with a dendritic contribution to hotspot structure. These findings suggest a unique visual computation and spike generation mechanism in the signals carried by smooth monostratified cells to the brain.
Author: David H. Rapaport
Publisher:
ISBN:
Category : Developmental neurobiology
Languages : en
Pages : 100
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Book Description
Author: Nora Jane Brackbill
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The retina is the first stage of the visual system, where light is absorbed and encoded in the spikes of neurons. Information from roughly 100 million photoreceptors is compressed to the outputs of roughly 1 million neurons, called retinal ganglion cells, that make up the optic nerve. This is the brain's only source of visual information, yet how the retina uses this limited bandwidth is not well understood. This is particularly true for natural vision in primates, despite its relevance for human health applications, as retinal research is primarily done in non-primate species using targeted, artificial stimuli. Here, large-scale, multi-electrode recordings are used to investigate natural image processing in the primate retina through the complementary lenses of encoding, where computational models are used to predict the responses of RGCs to natural stimuli, and decoding, or reconstruction, where the stimulus is estimated from the RGC responses.
