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Author: Sukumar Vijayaraghavan Publisher: Frontiers Media SA ISBN: 288919714X Category : Acetylcholine Languages : en Pages : 129
Book Description
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: Sukumar Vijayaraghavan Publisher: Frontiers Media SA ISBN: 288919714X Category : Acetylcholine Languages : en Pages : 129
Book Description
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: J. Klein Publisher: Elsevier ISBN: 044482166X Category : Medical Languages : en Pages : 397
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: Man Singh Publisher: Springer Science & Business Media ISBN: 1468412183 Category : Medical Languages : en Pages : 544
Book Description
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: D. Jenden Publisher: Springer Science & Business Media ISBN: 1468430963 Category : Psychology Languages : en Pages : 867
Book Description
This volume represents a collection of papers which were contributed by participants at a Symposium for Cholinergic Mechanisms and Psycho pharmacology, held in La Jolla, California on March 28-30, 1977. The were chosen to emphasize areas in which there has been substantial topics progress in the past 2-3 years and fall into seven major groups dealingwith: cholinergiC receptors; chemistry, histochemistry and enzymology; cyclic nucleotides and cholinergiC mechanisms; storage, compartmentation and release of acetylcholine; regulatory mechanisms in acetylcholine metab olism; modulation of acetylcholine metabolism; and behavioral and clin ical manifestations of cholinergiC function and dysfunction. Each group contains one or more reviews and a number of shorter contributions de scribing current work. This symposium was the third in a series of which the first two were held in Skokloster, Sweden in 1970 and Boldern, Switzerland in 1974. The Proceedings of the meetings indicate a rapid development of knowledge of cholinergiC mechanisms which for many years lagged behind that of other neurotransmitters and neuroregulators. The inclusion of a large section in the present volume dealing with clinical manifestations of cholinergiC dysfunction reflects one of the most important trends in current research on cholinergiC mechanisms, namely the close inter-relationship and mutual support of basic science and clinical investigation. I hope that this volume will be of value to all those whose work relates to cholinergiC function, at both basic and clinicalleve18, and will continue to stimulate the vigorous exchange of ideas which was such a prominent feature of the Symposium.
Author: Mohammed Shoaib Publisher: Springer Nature ISBN: 3030560139 Category : Medical Languages : en Pages : 245
Book Description
The molecular genetics of the cholinergic system including both muscarinic and nicotinic acetylcholine receptors, cholinesterases, acetylcholine synthesis and release have provided significant insights into potential targeting for pharmacological intervention. Cholinergic drugs are being used or evaluated for the treatment of diseases. Thus, this volume aims to broaden our understanding of the current state of cholinergic mechanisms to enable implementation of novel approaches for the development of more effective treatments.
Author: A. Claudio Cuello Publisher: Elsevier ISBN: 0444897178 Category : Medical Languages : en Pages : 486
Book Description
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: R. Wayne Albers Publisher: Academic Press ISBN: 0080959016 Category : Science Languages : en Pages : 1121
Book Description
Basic Neurochemistry, Eighth Edition, is the updated version of the outstanding and comprehensive classic text on neurochemistry. For more than forty years, this text has been the worldwide standard for information on the biochemistry of the nervous system, serving as a resource for postgraduate trainees and teachers in neurology, psychiatry, and basic neuroscience, as well as for medical, graduate, and postgraduate students and instructors in the neurosciences. The text has evolved, as intended, with the science. This new edition continues to cover the basics of neurochemistry as in the earlier editions, along with expanded and additional coverage of new research from intracellular trafficking, stem cells, adult neurogenesis, regeneration, and lipid messengers. It contains expanded coverage of all major neurodegenerative and psychiatric disorders, including the neurochemistry of addiction, pain, and hearing and balance; the neurobiology of learning and memory; sleep; myelin structure, development, and disease; autism; and neuroimmunology. Completely updated text with new authors and material, and many entirely new chapters Over 400 fully revised figures in splendid color 61 chapters covering the range of cellular, molecular and medical neuroscience Translational science boxes emphasizing the connections between basic and clinical neuroscience Companion website at http://elsevierdirect.com/companions/9780123749475
Author: Kenneth L. Davis Publisher: Springer Science & Business Media ISBN: 1461329345 Category : Medical Languages : en Pages : 592
Book Description
Recent years have witnessed a resurgence of interest in the possible role of brain acetylcholine in neuropsychiatric disease. Research in this area has involved the renewed investigation of the cholinomimetics physostigmine and arecoline, and has been facilitated by the development of new potential cholinomimetics such as dimethylaminoethanol (Deanol) and choline chloride. Current investigators also have taken advantage of new approaches to neurochemical studies. Increasingly sensitive assay techniques such as gas chromatography/mass spectrometry have allowed investigators to measure low concentra tions of choline and acetylcholine in brain tissues. Improved neuroanatomical procedures such as immunohistochemical staining and the use of microelectrodes and micropipets have enabled skilled investigators to begin to map central acetylcholine pathways and to dissect the component parts of the complex interactions between brain acetylcholine and other neurotransmitters. The convergence of data from both clinical and basic studies now suggest that brain acetylcholine may be involved in affective illness, several movement disorders, and some cognitive disturbances. The purpose of this book is to summarize recent clinical and pre-clinical investigations on the possible role of brain acetylcholine in several neurological and psychiatric disorders. The volume is divided into six major sections: (1) Brain Acetylcholine and Psychiatric Disorders; (2) Brain Acetylcholine and Movement Disorders; (3) Brain Acetylcholine and Cognitive Function; (4) The Electrophysiology of Cholinergic Agents; (5) Interactions of Brain Acetylcholine and Other Neurotransmitters; (6) Biochemical and Pharmacological Aspects of CholinergiC Treatment Strategies.
Author: F DeFeudis Publisher: Elsevier ISBN: 0323159559 Category : Medical Languages : en Pages : 236
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.
Author: Sukumar Vijayaraghavan
Author: Sukumar Vijayaraghavan
Author: J. Klein
Author: Peter Gaudenz Waser
Author: Man Singh
Author: D. Jenden
Author: Mohammed Shoaib
Author: A. Claudio Cuello
Author: R. Wayne Albers
Author: Kenneth L. Davis
Author: F DeFeudis