Information Processing in the Visual Systems of Arthropods PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Information Processing in the Visual Systems of Arthropods PDF full book. Access full book title Information Processing in the Visual Systems of Arthropods by Rüdiger Wehner. Download full books in PDF and EPUB format.
Author: Rüdiger Wehner Publisher: Springer Science & Business Media ISBN: 3642654770 Category : Science Languages : en Pages : 325
Book Description
It is now generally accepted for a variety of reasons - morphological as well as physiologica- that the visual systems of arthropods provide a suitable model for the study of information proces sing in neuronal networks. Unlike the neurophysiology of the visual pathway in the frog and the cat which is more than adequately documented, recent work on the compound eye and optical ganglia of spiders, crustaceans, and insects has scarcely been summarized. In order to fill this void so that others, especially vertebrate neurophysiologists may become familiar with the advan tages of these systems, our group at Zurich University organized here in March 1972, a European meeting to discuss the anatomical. ! neurophysiological and behavioral knowledge on the compound eye and the visual. pathway of arthropods. Systems analysis was regarded as the main theme of the conference, but systems analysis of a network of neurons cannot be done as a mere "black-box" maneuver. The conference therefore tried to reconcile neurophysiology and behavioral analysis in order to make predictions about a necessary and sufficient neural structure. The "wiring dia grams" of such a structure might then be confirmed histologically. Hence the aim of the conferen ce was not to deal only with the structure and function of the compound eye - i. e.
Author: Rüdiger Wehner Publisher: Springer Science & Business Media ISBN: 3642654770 Category : Science Languages : en Pages : 325
Book Description
It is now generally accepted for a variety of reasons - morphological as well as physiologica- that the visual systems of arthropods provide a suitable model for the study of information proces sing in neuronal networks. Unlike the neurophysiology of the visual pathway in the frog and the cat which is more than adequately documented, recent work on the compound eye and optical ganglia of spiders, crustaceans, and insects has scarcely been summarized. In order to fill this void so that others, especially vertebrate neurophysiologists may become familiar with the advan tages of these systems, our group at Zurich University organized here in March 1972, a European meeting to discuss the anatomical. ! neurophysiological and behavioral knowledge on the compound eye and the visual. pathway of arthropods. Systems analysis was regarded as the main theme of the conference, but systems analysis of a network of neurons cannot be done as a mere "black-box" maneuver. The conference therefore tried to reconcile neurophysiology and behavioral analysis in order to make predictions about a necessary and sufficient neural structure. The "wiring dia grams" of such a structure might then be confirmed histologically. Hence the aim of the conferen ce was not to deal only with the structure and function of the compound eye - i. e.
Author: Nicholas James Strausfeld Publisher: Harvard University Press ISBN: 0674046331 Category : Science Languages : en Pages : 849
Book Description
In The Descent of Man, Charles Darwin proposed that an ant’s brain, no larger than a pin’s head, must be sophisticated to accomplish all that it does. Yet today many people still find it surprising that insects and other arthropods show behaviors that are much more complex than innate reflexes. They are products of versatile brains which, in a sense, think. Fascinating in their own right, arthropods provide fundamental insights into how brains process and organize sensory information to produce learning, strategizing, cooperation, and sociality. Nicholas Strausfeld elucidates the evolution of this knowledge, beginning with nineteenth-century debates about how similar arthropod brains were to vertebrate brains. This exchange, he shows, had a profound and far-reaching impact on attitudes toward evolution and animal origins. Many renowned scientists, including Sigmund Freud, cut their professional teeth studying arthropod nervous systems. The greatest neuroanatomist of them all, Santiago Ramón y Cajal—founder of the neuron doctrine—was awed by similarities between insect and mammalian brains. Writing in a style that will appeal to a broad readership, Strausfeld weaves anatomical observations with evidence from molecular biology, neuroethology, cladistics, and the fossil record to explore the neurobiology of the largest phylum on earth—and one that is crucial to the well-being of our planet. Highly informative and richly illustrated, Arthropod Brains offers an original synthesis drawing on many fields, and a comprehensive reference that will serve biologists for years to come.
Author: Robert B. Northrop Publisher: ISBN: Category : Languages : en Pages : 64
Book Description
The report covers results of studies of neural information processing in the compound-eye visual systems of insects subject to a restricted class of visual object stimuli. In the first phase of the research, the behavior of single visual units in the optic lobes of Romalea were described and categorized. Eight types of operation on visual objects were defined. Similar operations were observed in single visual units in the optic lobes of Locusta and Schistocerca. In the second phase of the study, spatial resolution was examined for a variety of classes of visual unit in the locust. The anomalous 0.3 degree resolution of the VNC giant fiber was verified for spot checkerboard stimuli, as well as a radial grating. The 'edge effect' for the radial grating was seen to give enhanced response with the mask when max. stripe period was above a certain limit, and to be spoiled by the mask when below the limit. The resolution of vector units in the 3rd cervical nerve was tested, and found to follow Nyquist theory. Results suggested that a 2-mode-system may exist in insect vision: one to measure, without regard to form, local changes in light intensity over the eye; the other responding to object form-in-motion. The latter system is subject to the constraints of spatial sampling theory. (Author).
Author: Adrian Horridge Publisher: CABI ISBN: 1789240891 Category : Science Languages : en Pages : 293
Book Description
This book is the only account of what honeybees actually see. Bees detect some visual features such as edges and colours, but there is no sign that they reconstruct patterns or put together features to form objects. Bees detect motion but have no perception of what it is that moves, and certainly they do not recognize "things" by their shapes. Yet they clearly see well enough to fly and find food with a minute brain. Bee vision is therefore relevant to the construction of simple artificial visual systems, for example for mobile robots. The surprising conclusion is that bee vision is adapted to the recognition of places, not things. In this volume, Adrian Horridge also sets out the curious and contentious history of how bee vision came to be understood, with an account of a century of neglect of old experimental results, errors of interpretation, sharp disagreements, and failures of the scientific method. The design of the experiments and the methods of making inferences from observations are also critically examined, with the conclusion that scientists are often hesitant, imperfect and misleading, ignore the work of others, and fail to consider alternative explanations. The erratic path to understanding makes interesting reading for anyone with an interest in the workings of science but particularly those researching insect vision and invertebrate sensory systems.
Author: N. J. Strausfeld Publisher: Springer Science & Business Media ISBN: 3642821154 Category : Medical Languages : en Pages : 445
Book Description
The "functional" in the title of this book not only reflects my personal bias about neuroanatomy in brain research, it is also the gist of many chapters which describe sophisticated ways to resolve structures and interpret them as dynamic entities. Examples are: the visualization of functionally identified brain areas or neurons by activity staining or intracellular dye-iontophoresis; the resolution of synaptic connections between physiologically identified nerve cells; and the biochemical identification of specific neurons (their peptides and transmitters) by histo- and immunocytochemistry. I personally view the nervous system as an organ whose parts, continuously exchanging messages, arrive at their decisions by the cooperative phenome non of consensus and debate. This view is, admittedly, based on my own ex perience of looking at myriads of nerve cells and their connections rather than studying animal behaviour or theorizing. Numerous structural studies have demonstrated that interneurons in the brain must receive hundreds of thousands of synapses. Many neurons receive inputs from several different sensory areas: each input conveys a message about the external world and possibly also about past events which are stored within the central nervous system. Whether an interneuron responds to a certain combination of inputs may be, literally, a matter of debate whose outcome is decided at the post synaptic membrane. A nerve cell responding to an overriding command is possibly a rare event.
Author: Rüdiger Wehner
Author: Rüdiger Wehner
Author: 
Author: 
Author: 
Author: Rüdiger Wehner
Author: Ernest Fitch Guignon
Author: Nicholas James Strausfeld
Author: Robert B. Northrop
Author: Adrian Horridge
Author: N. J. Strausfeld