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During the last decades, investigations on the olivo-cerebellar system have attained a high level of sophistication, which led to redefinitions of several structural and functional properties of neurons, synapses, connections and circuits. Research has expanded and deepened in so many directions and so many theories and models have been proposed that an ensemble review of the matter is now needed. Yet, hot topics remain open and scientific discussion is very lively at several fronts. One major question, here as well as in other major brain circuits, is how single neurons and synaptic properties emerge at the network level and contribute to behavioural regulation via neuronal plasticity. Other major aspects that this Research Topic covers and discusses include the development and circuit organization of the olivo-cerebellar network, the established and recent theories of learning and motor control, and the emerging role of the cerebellum in cognitive processing. By touching on such varied and encompassing subjects, this Frontiers Special Topic aims to highlight the state of the art and stimulate future research. We hope that this unique collection of high-quality articles from experts in the field will provide scientists with a powerful basis of knowledge and inspiration to enucleate the major issues deserving further attention.
During the last decades, investigations on the olivo-cerebellar system have attained a high level of sophistication, which led to redefinitions of several structural and functional properties of neurons, synapses, connections and circuits. Research has expanded and deepened in so many directions and so many theories and models have been proposed that an ensemble review of the matter is now needed. Yet, hot topics remain open and scientific discussion is very lively at several fronts. One major question, here as well as in other major brain circuits, is how single neurons and synaptic properties emerge at the network level and contribute to behavioural regulation via neuronal plasticity. Other major aspects that this Research Topic covers and discusses include the development and circuit organization of the olivo-cerebellar network, the established and recent theories of learning and motor control, and the emerging role of the cerebellum in cognitive processing. By touching on such varied and encompassing subjects, this Frontiers Special Topic aims to highlight the state of the art and stimulate future research. We hope that this unique collection of high-quality articles from experts in the field will provide scientists with a powerful basis of knowledge and inspiration to enucleate the major issues deserving further attention.
This volume offers up-to-date reviews on different aspects of the olivocerebellar system. The latest research results are presented on morphological organization, development of afferent and efferent connections, neurotransmitters, and general electrophysiology. The possible part played in the dynamic control of movements and in motor learning and memory is discussed with theoretical models and some clinical problems. The reader has access in one volume to all studies currently being conducted and to the sometimes controversial views on the role of the inferior olive in cerebellar function and motor control.
Recently, the role of the olivocerebellar projection in cerebellar operation has drawn the attention of many scientists who are trying to understand how the cerebellum controls movements. The papers published in this book were presented at a meeting held in Turin on August 9-12, 1987 as a satellite symposium of the 2nd World IBRO Congress in Budapest. It was planned in collaboration with Rodolfo Llinas and Masao Ito, although the latter was not able to attend. Some of the papers are in the form of reviews, others are short communications of new unpublished results. All aspects of research on the inferior olive are covered including morphology, neurotransmission, development, and electrophysiology, as well as its relation to behaviour and to human pathology. The lively, endless scientific discussions have not been published, but the reader may well imagine them from the different and sometimes contrasting pOints of views expressed in the papers. There are many examples showing that integrity of the inferior olive is necessary for some forms of motor learning and for the adaptive capabilities ofthe motor system. On the other hand, there is evidence that the inferior olive is important in controlling the dynamic characteristics of movement, both as a phasic and as a tonic operator. From this, two main viewpoints have emerged. The "plasticitists" attribute the role of inducing plastic changes to the synapse between the climbing fibre and the Purkinje cell.
In recent years the inferior olive and its projection to the cerebellum have attracted considerable interest. Numerous experimental anatomic and electrophysiologic studies have been undertaken, and much new information has been brought forward. Many apparently discordant observations have been reported however, and on many points the data obtained by the use of different methbds and approaches appear to be diffi cult to reconcile. Much of the interest in the olivocerebellar projection concerns the topographical localization within the projection. Particularly as a result of research in recent years the pattern of localization has turned out to be far more complex than previously be lieved. It was found useful, therefore, to attempt a review of the subject in the hope that a critical analysis of available observations might make it possible to obtain an integrated picture of the olivocerebellar projection and perhaps fmd some basic principles in the organization of this fiber system. As will be seen, our attempt has been only partly successful. There are still riddles that remain to be solved. In the present review attention will be focused on problems related to the locali zation within the olivocerebellar projection, particularly its anatomic aspects. An extensive review of the physiology of the inferior olive has been published recently by Armstrong (1974), who considers some anatomicophysiologic correlations as well. Physiologic fmdings will be referred to here mainly in relation to our main theme.
Essentials of the Cerebellum and Cerebellar Disorders is the first book of its kind written specifically for graduate students and clinicians. It is based on the 4-volume treatise, Handbook of the Cerebellum and Cerebellar Disorders (Springer, 2013), the definitive reference for scientists and neurologists in the field of cerebellar neurobiology. There have been fundamental advances in the basic science and clinical neurology of the cerebellum and its role in sensorimotor function and cognition. This monograph makes this large and expanding body of knowledge readily accessible to trainees and clinicians alike. The editors are world leaders in the field, and the chapters are authored by an international panel of experts drawn from ataxia clinics and cerebellar laboratories throughout North America, Europe and Asia. Essentials provides a solid grounding in the field of cerebellar research and ataxiology from cerebellar circuity to clinical practice, and it serves as a springboard to a deeper appreciation of both the principles and the complexities of cerebellar neurobiology. Clinicians are expected to have a deep appreciation of cerebellar disorders, not only in specialized ataxia clinics but also in adult and pediatric neurology, neurosurgery, psychiatry and neuropsychology practices, and in outpatient and inpatient rehabilitation settings. This book is an indispensable resource for students and practitioners navigating the evolving field of cerebellar motor and cognitive neurology. It also links to the more expansive Handbook for those who need to explore the topics in this monograph in greater depth.
Our knowledge of cerebellar functions and cerebellar disorders, called ataxias, is increasing considerably. Studies of the cerebellum are now a central focus in neuroscience. During the last four decades, many laboratories worldwide have dedicated their research activities to understanding the roles of the cerebellum in motor control, cognitive processes and biology of mental processes, behavioral symptoms, and emotion. It is now accepted that the cerebellum acts as a cognitive operator in learning, perception, and attention. Moreover, major improvements in our assessment of in vivo cerebellar architecture using imaging techniques have occurred. A typical example is the accurate description of cerebellar anatomy during fetal development with MRI, a progress which has direct impacts on patient care. These advances have been associated with discoveries of new clinical disorders, in particular in the field of genetic ataxias. More than 20 new genes have been identified these last 10 years. Only for dominant ataxias, more than 30 diseases have now been unravelled. The number of ataxic disorders will increase with aging, the cerebellum being the structure of the brain with the most important loss of neurons with age. More than 300 different cerebellar disorders are encountered during daily practice, but we are missing a single source of information explaining their pathogenesis. Despite the immense amount of knowledge acquired about the cerebellar circuitry these last years, a large book covering the neuroscience of the cerebellum is missing. The goal of this endeavour is to bring up to date information relevant for basic science and also for clinical activities. To reach this goal, the most renowned authors are gathered in a unique and in-depth book with a format of a handbook. We emphasize the connections between molecular findings, imaging features, behavioural/neuropsychological aspects, and clinical implications.
During the last three decades, many laboratories worldwide have dedicated their research activities to understanding the roles of the cerebellum in motor control, cognitive processes and the biology of mental processes, behavioral symptoms and emotion. These advances have been associated with discoveries of new clinical disorders, in particular in the field of genetic ataxias, and the growing number of diseases presents a source of difficulty for clinicians during daily practice. This practical guide summarizes and evaluates current knowledge in the field of cerebellar disorders. Encompassing details of both common and uncommon cerebellar ataxias, including vascular, immune, neoplastic, infectious, traumatic, toxic and inherited disorders, this book will assist clinicians in the diagnosis and management of the full spectrum of cerebellar ataxias encountered in daily practice. Essential reading for clinicians, including general practitioners, neurologists, pediatricians, radiologists, psychiatrists and neuropsychologists, this will also prove a valuable tool for students, trainees and researchers.