Cholinergic Mechanisms in the Central Nervous System PDF Download

Author: Yng-shiuh Sheu
Publisher:
ISBN:
Category :
Languages : en
Pages : 212

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: J. Klein
Publisher: Elsevier
ISBN: 044482166X
Category : Medical
Languages : en
Pages : 397

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Book Description
This volume offers a comprehensive update and overview of the field of cholinergic transmission as presented by some thirty distinguished investigators who were recruited for their task from Germany, Great Britain, Canada, USA, Sweden, Israel, France and Italy. Exciting new discoveries, described in this volume, are due to recent methodological breakthroughs. These discoveries throw new light on many areas of cholinergic mechanisms.

Author: Gabriel Joseph Maletta
Publisher:
ISBN:
Category : Rats
Languages : en
Pages : 276

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Author: Man Singh
Publisher: Springer Science & Business Media
ISBN: 1468412183
Category : Medical
Languages : en
Pages : 544

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Although serious interest in studying the role of central cho linergic processes in psychopathology is just beginning to emerge, experimental literature on the part played by cholinergic mechanisms in brain behavior. reiations is quite extensive. During the past thirty years, cholinergic research has contributed significantly to the characterization and differentiation of adaptive mechanisms in volved in input selection, perception, cortical, autonomic and behav ioral activation, learning, memory, and inhibitory control of behav ioral outputs. To say that dysfunction of one or more of these mech anisms may be at the root of neuropsychiatric illnesses such as schiz ophrenia would be stating the obvious. This book examines the part cholinergic processes might play in dysfunctions of the adaptive processes involved in higher brain func tions and their significance for the pathogenesis, classification, etiology, and treatment of psychopathological conditions. In a series of wide ranging reviews of the available information, the subject is discussed from a variety of perspectives, using data derived from both experimental and clinical research. The purpose is not so much to determine whether cholinergic excess or deficiency is causal in this or that neuropsychiatric syndrome, but rather to try to understand the disease mechanisms in terms of adaptive processes in which cholinergic systems seem to play an important part.

Author: A. Claudio Cuello
Publisher: Elsevier
ISBN: 0444897178
Category : Medical
Languages : en
Pages : 486

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Presents a comprehensive update of central cholinergic mechanisms from their most molecular aspects to possible clinical applications modifying cholinergic neurotransmission. A considerable number of high-calibre scientists from several continents contributed to this volume.

Author: Alexander G. Karczmar
Publisher: Springer Science & Business Media
ISBN: 038746526X
Category : Science
Languages : en
Pages : 698

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Even if the “weapons of mass destruction” (WMD) and, among them, stocks of organoph- phorus (OP) agents (also referred to as war gases and nerve gases) were not found in Iraq following the US-Iraq war, the relative ease with which these substances can be made from harmless precursors and the low cost of their manufacture will continue to fascinate pow- hungry, ruthless dictators, as well as multinational and international terrorists, particularly as the close relationship between the OP agents and useful insecticides makes it easy to disguise the importation and purchase of small amounts of the precursors. Indeed, the use by Saddam Hussein of a nerve gas against the Kurds and his possible employment of the OP agents during his war with Iran, and the Sarin attack in the Tokyo underground by an extremist religious set magnetized the world with respect to the OP drugs. As these drugs exert their toxicity via their cholinergic action on the nervous, particularly central nervous, system, it is no wonder that the research in the cholinergic ? eld attracts, and merits, our intense attention. These considerations underlie the signi? cance of this book, as Alex Karczmar devotes an entire chapter of Exploring the Vertebrate Central Cholinergic Nervous System to anticholinest- ases (antiChEs), and as he is an acknowledged expert in the ? eld of cholinergic toxicity as well as a consultant to the Surgeon General of the U. S. Army.

Author: Perry Black
Publisher:
ISBN:
Category :
Languages : en
Pages : 25

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The principal purpose of this study was to investigate the possible differential effects of LSD as a function of procedural variations in performance of delayed response tasks. In general, LSD was found to impair delayed response performance in the monkey. From the standpoint of dose-effect relationships, the results suggest a positive correlation between magnitude of dose and extent of functional impairment. A tendency toward rapidly developing tolerance was observed. A 'placebo effect' in response to the control agent (sterile water) was encountered in a significant number of monkeys.

Author: Sukumar Vijayaraghavan
Publisher: Frontiers Media SA
ISBN: 288919714X
Category : Acetylcholine
Languages : en
Pages : 129

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Much of our understanding of brain physiology has focused on what one might call, first order processes. These essentially include the primary synaptic mechanisms underlying excitation (mainly glutamate) and inhibition (mainly GABA). Our attention has focused on how the balance of excitation and inhibition regulates the timing, patterns, and extent of information flow across various circuits. A lot less is understood regarding second order processes that sculpt and modify these primary interactions. One such modulatory transmitter in the brain is acetylcholine (ACh). The importance of ACh in modulating various behaviors related to learning, memory, and attention has been recognized over the last four decades as has its involvement in various neurodegenerative and psychiatric disorders. However, our understanding of the mechanistic bases for these actions is at its infancy, at best and much remains to be understood. The array of receptor subtypes for nicotinic and muscarinic receptors, their different locations, and complex signal transduction mechanisms remain a puzzle. Transmitter (ACh) release sites and their relationship to receptor loci are poorly understood. Overall, we lack a unifying framework for conceptualizing how disparate actions of the transmitter on receptors lead to circuit modulation and, eventually, influences on cognition. By its very nature, reports on cholinergic signaling are quite scattered, presented in journals across sub-disciplines and in the context of the systems they modulate. Hence, there is need for consolidation of these studies under a single cover that would allow one to compare and contrast the effects of this transmitter across systems and contexts. This special issue represents one such compilation. The issue addresses cholinergic modulation of defined circuits that lead to specific behaviors and consists of a judicious mixture of review articles and primary papers. The articles focus on three aspects of the system: 1) Cellular targets of cholinergic signaling. 2) Receptor mechanisms. 3) Endogenous transmitter distribution and action. While no common mechanism emerges that can explain cholinergic actions on brain functions, on can postulate that the transmitter system is dynamic, modulating the balance of excitation and inhibition in various circuits. This modulation sets up timed network oscillations and it is tempting to speculate that these oscillations form a template for better encoding of afferent inputs. One can broadly envision the role of the cholinergic system as facilitating processes that allow for more efficient acquisition of learning and engraving of memories. Thus, understanding the mechanisms underlying tonic and stimulus-dependent release of ACh and how it alters firing templates of neuronal networks would be the first step towards elucidating its role in learning and memory. This special topics edition provides clues to some of the actions of ACh. It is hoped that the articles allow the reader to extract common themes and potential mechanisms of cholinergic regulation that will lead to elucidation of general principles governing the actions of this important neuromodulator.

Author: F DeFeudis
Publisher: Elsevier
ISBN: 0323159559
Category : Medical
Languages : en
Pages : 236

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Book Description
Central Cholinergic Systems and behavior reviews experimental evidence on the possible involvement of central cholinergic systems in the regulation of animal behavior. More specifically, the book investigates the role of acetylcholine as a transmitter in the mammalian spinal cord and in central nervous function. This text also describes cholinergic involvement in some of the more fundamental processes of central nervous functions and how it may fit into overall cholinergic and non-cholinergic behavioral patterns. This book is organized into seven chapters and begins with an overview of the link between central cholinergic mechanisms and behavior, and then discusses the cholinergic roles in consciousness, emphasizing on the roles of reticular systems in the arousal mechanism. An effort is made to define the cholinergic nature of some spinal mechanisms that are apparently involved in reflexes and posture. An account of the role of cholinergic mechanisms in central respiratory control is also given, along with the function of acetylcholine as an important transmitter at many sites of the central nervous system. The book concludes by analyzing the roles of cholinergic systems in motivated behaviors, emotion, learning, and memory. This book is a valuable resource for students and researchers in fields ranging from physiology to biology and psychiatry.