The Ca3 Region Of The Hippocampus How Is It What Is It For How Does It Do It

Author : Enrico Cherubini
Publisher : Frontiers Media SA
ISBN 13 : 2889196313
Total Pages : 167 pages
Book Rating : 4.19/5 ( download)

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Download or read book The CA3 Region of the Hippocampus: How is it? What is it for? How does it do it? written by Enrico Cherubini and published by Frontiers Media SA. This book was released on 2015-08-19 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: The CA3 hippocampal region receives information from the entorhinal cortex either directly from the perforant path or indirectly from the dentate gyrus via the mossy fibers (MFs). According to their specific targets (principal/mossy cells or interneurons), MFs terminate with large boutons or small filopodial extensions, respectively. MF-CA3 synapses are characterized by a low probability of release and pronounced frequency-dependent facilitation. In addition MF terminals are endowed with mGluRs that regulate their own release. We will describe the intrinsic membrane properties of pyramidal cells, which can sometimes fire in bursts, together with the geometry of their dendritic arborization. The single layer of pyramidal cells is quite distinct from the six-layered neocortical arrangement. The resulting aligned dendrites provides the substrate for laminated excitatory inputs. They also underlie a precise, diversity of inhibitory control which we will also describe in detail. The CA3 region has an especially rich internal connectivity, with recurrent excitatory and inhibitory loops. In recent years both in vivo and in vitro studies have allowed to better understand functional properties of the CA3 auto-associative network and its role in information processing. This circuit is implicated in encoding spatial representations and episodic memories. It generates physiological population synchronies, including gamma, theta and sharp-waves that are presumed to associate firing in selected assemblies of cells in different behavioral conditions. The CA3 region is susceptible to neurodegeneration during aging and after stresses such as infection or injury. Loss of some CA3 neurones has striking effects on mossy fiber inputs and can facilitate the generation of pathologic synchrony within the CA3 micro-circuit. The aim of this special topic is to bring together experts on the cellular and molecular mechanisms regulating the wiring properties of the CA3 hippocampal microcircuit in both physiological and pathological conditions, synaptic plasticity, behavior and cognition.We will particularly emphasize the dual glutamatergic and GABAergic phenotype of MF-CA3 synapses at early developmental stages and the steps that regulate the integration of newly generated neurons into the adult dentate gyrus-CA3 circuit.

Author : Ryszard M. Pluta
Publisher :
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.22/5 ( download)

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Download or read book Cerebral Ischemia written by Ryszard M. Pluta and published by . This book was released on 2021 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cerebral ischemia is one of the most common causes of dementia, which develops in more than half of patients after an ischemic episode. The main mechanism is thought to be pathological changes in the hippocampus, especially in the CA1 area, underlying episodic memory impairment, which is the earliest and most important clinical symptom of post-ischemic dementia. The 13 chapters of this book present a new picture of ischemic brain disease, synthesizing the latest data on disease mechanisms, care for patients with this disease, and potential therapeutic targets. The authors present the characteristics of cerebral ischemia from pregnancy and childhood through adolescence to adulthood. The first two chapters provide a snapshot of the anatomy of the cerebral cortex and the hippocampus, the most affected brain structures after cerebral ischemia. This is followed by nine chapters that present a comprehensive view of the pathological mechanisms of cerebral ischemia, and how a deep understanding of these pathomechanisms hold the key for the discovery and development of novel therapies to help patients affected by cerebral ischemia. Chapter 12 shares real-life experience and challenges of rehabilitating patients into the community after cerebral ischemia, and chapter 13 analyzes the social risk variations, including gender inequality, in the reintegration of post-ischemic stroke patients. Although primarily aimed at scientists and clinicians, the contents of the book will be of interest to all those who are interested in cerebral ischemia, including patients and their caregivers.

Author : Helen E. Scharfman
Publisher : Elsevier Science Serials
ISBN 13 : 9780444530158
Total Pages : 787 pages
Book Rating : 4.50/5 ( download)

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Download or read book The Dentate Gyrus written by Helen E. Scharfman and published by Elsevier Science Serials. This book was released on 2007 with total page 787 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compilation of the fundamentals of the dentate gyrus, an area of the brain of intense scientific interest due to its capacity for plasticity.

Author : Roger D. Traub
Publisher : Cambridge University Press
ISBN 13 : 0521364817
Total Pages : 306 pages
Book Rating : 4.12/5 ( download)

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Download or read book Neuronal Networks of the Hippocampus written by Roger D. Traub and published by Cambridge University Press. This book was released on 1991-05-31 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The questions of how a large population of neurons in the brain functions, how synchronized firing of neurons is achieved, and what factors regulate how many and which neurons fire under different conditions form the central theme of this book. Important neurological techniques for the physiological reconstruction of a large biological neural network are presented.

Author : Per Andersen
Publisher : Oxford University Press
ISBN 13 : 9780195100273
Total Pages : 892 pages
Book Rating : 4.71/5 ( download)

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Download or read book The Hippocampus Book written by Per Andersen and published by Oxford University Press. This book was released on 2007 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hippocampus is one of a group of remarkable structures embedded within the brain's medial temporal lobe. Long known to be important for memory, it has been a prime focus of neuroscience research for many years. The Hippocampus Book promises to facilitate developments in the field in a major way by bringing together, for the first time, contributions by leading international scientists knowledgeable about hippocampal anatomy, physiology, and function. This authoritative volume offers the most comprehensive, up-to-date account of what the hippocampus does, how it does it, and what happens when things go wrong. At the same time, it illustrates how research focusing on this single brain structure has revealed principles of wider generality for the whole brain in relation to anatomical connectivity, synaptic plasticity, cognition and behavior, and computational algorithms. Well-organized in its presentation of both theory and experimental data, this peerless work vividly illustrates the astonishing progress that has been made in unraveling the workings of the brain. The Hippocampus Book is destined to take a central place on every neuroscientist's bookshelf.

Author : Jerome Engel
Publisher : Lippincott Williams & Wilkins
ISBN 13 : 9780781757775
Total Pages : 1272 pages
Book Rating : 4.70/5 ( download)

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Download or read book Epilepsy written by Jerome Engel and published by Lippincott Williams & Wilkins. This book was released on 2008 with total page 1272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written and edited by world-renowned authorities, this three-volume work is, to quote a reviewer, "the definitive textbook about seizures and epilepsy". This Second Edition is thoroughly updated and gives you a complete print and multimedia package: the three-volume set plus access to an integrated content Website. More than 300 chapters cover the spectrum of biology, physiology, and clinical information, from molecular biology to public health concerns in developing countries. Included are detailed discussions of seizure types and epilepsy syndromes; relationships between physiology and clinical events; psychiatric and medical comorbidity; conditions that could be mistaken for epilepsy; and an increasing range of pharmacologic, surgical, and alternative therapies, including vagus nerve stimulation and deep brain stimulation. This edition describes many new antiepileptic drugs, major advances in surgical treatment, and state-of-the-art neuroimaging, EEG, and other technologies for diagnosis and seizure prediction. A companion Website offers instant access to the complete, fully searchable text, plus an image bank of additional figures, video footage, and annual updates to selected chapters.

Author : Douglas D. Burman
Publisher : BoD – Books on Demand
ISBN 13 : 1837687129
Total Pages : 210 pages
Book Rating : 4.21/5 ( download)

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Download or read book Hippocampus written by Douglas D. Burman and published by BoD – Books on Demand. This book was released on 2023-07-19 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever since side effects from bilateral hippocampectomy were identified in Henry Molaison (patient “HM”) during the 1950s, a critical role of the hippocampus has been recognized in the formation of declarative episodic memories. Other cognitive functions have since been proposed, such as a role in navigation, but memory has often been suggested to explain hippocampal involvement. Proving a distinct functional role in cognition is difficult, as memory can be implicated in most cognitive activities. Even when a behavior relies on memory, however, the functionality of the hippocampus extends far beyond, especially evident during activities requiring interactions between cognitive systems. Relational memory is supported by hippocampal connections with widespread regions of the cortex; these interconnections also play a fundamental role in children’s writing abilities and expertise in musical performance. Besides enhancing individual lives, such activities can play a vital role in sustaining cultural values across generations. Interactions with the environment that do not directly depend on mnemonic activity can affect plasticity in hippocampal connections, modified through natural chemicals, pharmacological drugs, and non-pharmacological behaviors. Navigational properties of the hippocampal system are not limited to memory, containing the same navigational elements as our Global Positional System (GPS). Even cognitive deficits arising from hippocampal lesions in “HM” were not limited to memory, as they included deficits in understanding cognitive relationships available in visual scenes, novel sentence contexts, and humorous situations. This book shows an expansive role of the hippocampus in cognition that goes beyond its recognized role in generating new episodic memories.

Author :
Publisher : Elsevier
ISBN 13 : 9780444537393
Total Pages : 400 pages
Book Rating : 4.92/5 ( download)

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Download or read book Neuroendocrinology written by and published by Elsevier. This book was released on 2010-06-29 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neuroendocrinology is a discipline which originated about 50 years ago as a branch of Endocrinology and that is now strictly linked to neuroscience. Volumes 181 and 182 of Progress in Brain Research provide a rapid view of the major points presently discussed at biological and clinical levels. The chapters have been written by top scientists who are directly involved in basic or clinical research and who use the most sophisticated biotechnological techniques. The volumes cover of the role of genetics in many endocrine-related events, like neuroendocrinological diseases and endocrine depenedent cancers (prostate, breast, etc,). Interesting information is also provided on possibile treatments of neurodegenerative brain diseases (e.g., Alzheimer and similar syndromes). • The best researchers in the field provide their conclusions in the context of the latest experimental results • Chapters are extensively referenced to provide readers with a comprehensive list of resources on the topics covered • Of great value for researchers and experts, but also for students as a background reference

Author : Peter Jonas
Publisher : Frontiers Media SA
ISBN 13 : 288919387X
Total Pages : 134 pages
Book Rating : 4.75/5 ( download)

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Download or read book Structure, function, and plasticity of hippocampal dentate gyrus microcircuits written by Peter Jonas and published by Frontiers Media SA. This book was released on 2015-02-13 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hippocampus mediates several higher brain functions, such as learning, memory, and spatial coding. The input region of the hippocampus, the dentate gyrus, plays a critical role in these processes. Several lines of evidence suggest that the dentate gyrus acts as a preprocessor of incoming information, preparing it for subsequent processing in CA3. For example, the dentate gyrus converts input from the entorhinal cortex, where cells have multiple spatial fields, into the spatially more specific place cell activity characteristic of the CA3 region. Furthermore, the dentate gyrus is involved in pattern separation, transforming relatively similar input patterns into substantially different output patterns. Finally, the dentate gyrus produces a very sparse coding scheme in which only a very small fraction of neurons are active at any one time. How are these unique functions implemented at the level of cells and synapses? Dentate gyrus granule cells receive excitatory neuron input from the entorhinal cortex and send excitatory output to the hippocampal CA3 region via the mossy fibers. Furthermore, several types of GABAergic interneurons are present in this region, providing inhibitory control over granule cell activity via feedback and feedforward inhibition. Additionally, hilar mossy cells mediate an excitatory loop, receiving powerful input from a small number of granule cells and providing highly distributed excitatory output to a large number of granule cells. Finally, the dentate gyrus is one of the few brain regions exhibiting adult neurogenesis. Thus, new neurons are generated and functionally integrated throughout life. How these specific cellular and synaptic properties contribute to higher brain functions remains unclear. One way to understand these properties of the dentate gyrus is to try to integrate experimental data into models, following the famous Hopfield quote: “Build it, and you understand it.” However, when trying this, one faces two major challenges. First, hard quantitative data about cellular properties, structural connectivity, and functional properties of synapses are lacking. Second, the number of individual neurons and synapses to be represented in the model is huge. For example, the dentate gyrus contains ~1 million granule cells in rodents, and ~10 million in humans. Thus, full scale models will be complex and computationally demanding. In this Frontiers Research Topic, we collect important information about cells, synapses, and microcircuit elements of the dentate gyrus. We have put together a combination of original research articles, review articles, and a methods article. We hope that the collected information will be useful for both experimentalists and modelers. We also hope that the papers will be interesting beyond the small world of “dentology,” i.e., for scientists working on other brain areas. Ideally, the dentate gyrus may serve as a blueprint, helping neuroscientists to define strategies to analyze network organization of other brain regions.

Author : Jamil Aslam
Publisher : World Scientific
ISBN 13 : 9812818936
Total Pages : 262 pages
Book Rating : 4.35/5 ( download)

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Download or read book Contemporary Physics written by Jamil Aslam and published by World Scientific. This book was released on 2008 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume reviews the current status of research in major frontline areas of physics. With contributions from leading physicists, the areas of research covered in the various papers include condensed matter physics, particle physics, quantum optics, quantum computing and laser physics, nanosciences, synchrotron radiation, relativity, astrophysics and cosmology, and plasma physics.