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Author: Erol Başar Publisher: Springer Science & Business Media ISBN: 3642755453 Category : Medical Languages : en Pages : 186
Book Description
The analysis of deterministic chaos is currently an active field in many branches of research. Mathematically all nonlinear dynamical systems with more than two degrees of freedom can generate chaos, becoming unpredictable over a longer time scale. The brain is a nonlinear system par excellence. Accordingly, the concepts of chaotic dynamics have found, in the last five years, an important application in research on compound electrical activity of the brain. The present volume seeks to cover most of the relevant studies in the newly emerging field of chaotic attractors in the brain. This volume is essentially a selection and reorganization of contri butions from the first two volumes in the Springer Series in Brain Dynamics, which were based on conferences held in 1985 and 1987 in Berlin. It also includes (a) a survey of progress in the recording of evoked oscillations of the brain both at the cellular and EEG levels and (b) an agenda for research on chaotic dynamics. Although the first publications pointing out evidence of chaotic behavior of the EEG did not appear until the beginning of 1985, the presence of the pioneering scientists in this field gave the participants at the first conference (volume 1) a strong impulse toward this field. For me, as conference organizer, having been for a long time active in nonlinear EEG research, the integration of this topic was self-evident; however, the enthusiasm of the conference participants was greater than expected.
Author: Erol Başar Publisher: Springer Science & Business Media ISBN: 3642755453 Category : Medical Languages : en Pages : 186
Book Description
The analysis of deterministic chaos is currently an active field in many branches of research. Mathematically all nonlinear dynamical systems with more than two degrees of freedom can generate chaos, becoming unpredictable over a longer time scale. The brain is a nonlinear system par excellence. Accordingly, the concepts of chaotic dynamics have found, in the last five years, an important application in research on compound electrical activity of the brain. The present volume seeks to cover most of the relevant studies in the newly emerging field of chaotic attractors in the brain. This volume is essentially a selection and reorganization of contri butions from the first two volumes in the Springer Series in Brain Dynamics, which were based on conferences held in 1985 and 1987 in Berlin. It also includes (a) a survey of progress in the recording of evoked oscillations of the brain both at the cellular and EEG levels and (b) an agenda for research on chaotic dynamics. Although the first publications pointing out evidence of chaotic behavior of the EEG did not appear until the beginning of 1985, the presence of the pioneering scientists in this field gave the participants at the first conference (volume 1) a strong impulse toward this field. For me, as conference organizer, having been for a long time active in nonlinear EEG research, the integration of this topic was self-evident; however, the enthusiasm of the conference participants was greater than expected.
Author: K Lehnertz Publisher: World Scientific ISBN: 9814493589 Category : Medical Languages : en Pages : 384
Book Description
There has been a heated debate about whether chaos theory can be applied to the dynamics of the human brain. While it is obvious that nonlinear mechanisms are crucial in neural systems, there has been strong criticism of attempts to identify at strange attractors in brain signals and to measure their fractal dimensions, Lyapunov exponents, etc. Conventional methods analyzing brain dynamics are largely based on linear models and on Fourier spectra. Regardless of the existence of strange attractors in brain activity, the neurosciences should benefit greatly from alternative methods that have been developed in recent years for the analysis of nonlinear and chaotic behavior. Contents:Cortical Dynamics — Experiments and Models (S Rotter & A Aertsen)Is Nonlinearity Evident in Time Series of Brain Electrical Activity? (T Schreiber)Finding and Characterizing Unstable Fixed Points by Controlling System Dynamics (D T Kaplan)Detection of Phase Locking from Noisy Data: Application to Magnetoencephalography (M Rosenblum et al.)Dynamical Analysis in Clinical Practice (P E Rapp & T I Schmah)Rhythms of the Brain: Between Randomness and Determinism (F H Lopes da Silva et al.)Pre-ictal Changes of the EEG Dynamics in Epileptic Patients: Clinical and Neurobiological Implications (M Baulac et al.)Spatio-Temporal Dynamics of Epileptogenic Networks (M Le van Quyen et al.)Pre-ictal Changes and EEG Analyses Within the Framework of Lyapunov Theory (H R Moser et al.)Epilepsy — When Chaos Fails (J C Sackellares et al.)Possible Clinical and Research Applications of Nonlinear EEG Analysis in Humans (K Lehnertz et al.)Dynamics of EEG Signals During Petit-Mal Epileptic Seizures (R Friedrich)Detection of Epileptic Dynamics in Neuromagnetic Signals: Spectral Analyses Versus Characteristics of Correlation Function (E Bohl et al.)Nonlinear Methods for Evoked Potential Analyses and Modeling (B H Jansen)From Slow Potentials to Chaos: Processing in the Brain and Controlling the Brain (H Preiβl & W Lutzenberger)and other papers Readership: Neural scientists, physicists, statisticians and mathematicians interested in applying nonlinear dynamical system theory to brain research. Keywords:Human Brain Dynamics;Chaos Theory;Linear Models;Fourier Spectra
Author: Dennis W Duke Publisher: World Scientific ISBN: 9814555983 Category : Languages : en Pages : 266
Book Description
This conference brought together scientists from diverse disciplines such as biomedical and electrical engineering, mathematics, physics, neurology, neuroscience, psychophysiology and psychology to discuss the application of nonlinear dynamics in the study of brain function. This is a relatively new field which involves measuring the properties of chaotic strange attractors in the human EEG. Probably the earliest and still most exciting result in the field is that 'the more chaos the better' is the rule in many physiological areas. We have only the most speculative ideas about why the brain might be chaotic and what the implications are if it really is. The potential is unimaginably large. This volume will serve to inspire others to pursue research in this field and point the way in some promising directions.
Author: Walter J. Freeman Publisher: Columbia University Press ISBN: 9780231120081 Category : Consciousness Languages : en Pages : 190
Book Description
I think, therefore I am. The legendary pronouncement of philosopher René Descartes lingers as accepted wisdom in the Western world nearly four centuries after its author's death. But does thought really come first? Who actually runs the show: we, our thoughts, or the neurons firing within our brains? Walter J. Freeman explores how we control our behavior and make sense of the world around us. Avoiding determinism both in sociobiology, which proposes that persons' genes control their brains' functioning, and in neuroscience, which posits that their brains' disposition is molded by chemistry and environmental forces, Freeman charts a new course--one that gives individuals due credit and responsibility for their actions. Drawing upon his five decades of research in neuroscience, Freeman utilizes the latest advances in his field as well as perspectives from disciplines as diverse as mathematics, psychology, and philosophy to explicate how different human brains act in their chosen diverse ways. He clarifies the implications of brain imaging, by which neural activity can be observed during the course of normal movements, and shows how nonlinear dynamics reveals order within the fecund chaos of brain function.
Author: Erol Başar Publisher: Springer Science & Business Media ISBN: 3642745571 Category : Medical Languages : en Pages : 554
Book Description
This volume is based on contributions to the second Brain Dynamics Conference, held in Berlin on August 10-14, 1987, as a satellite conference of the Budapest Congress of the International Brain Research Organization. Like the volume resulting from the first conference, Dynamics of Sensory and Cognitive Processing by the Brain, the present work covers new approaches to brain function, with emphasis on electromagnetic fields, EEG, event-related potentials, connectivistic views, and neural networks. Close attention is also paid to research in the emerging field of deterministic chaos and strange attractors. The diversity of this collection of papers reflects a multipronged advance in a hitherto relatively neglected domain, i. e., the study of signs of dynamic processes in organized neural tissue in order both to explain them and to exploit them for clues to system function. The need is greater than ever for new windows. This volume reflects a historical moment, the moment when a relatively neglected field of basic research into available signs of dynamic processes ongoing in organized neural tissue is expanding almost explosively to complement other approaches. From the topics treated, this book should appeal, as did its predecessor, to neuroscientists, neurologists, scientists studying complex systems, artificial intelligence, and neural networks, psychobiologists, and all basic and clinical investigators concerned with new techniques of monitoring and analyzing the brain's electromagnetic activity.
Author: Theodore Melnechuk Publisher: Springer Science & Business Media ISBN: 3642715311 Category : Medical Languages : en Pages : 408
Book Description
In neurophysiology, the emphasis has been on single-unit studies for a quarter century, since the sensory work by Lettwin and coworkers and by Hubel and Wiesel, the cen tral work by Mountcastle, the motor work by the late Evarts, and so on. In recent years, however, field potentials - and a more global approach general ly - have been receiving renewed and increasing attention. This is a result of new findings made possible by technical and conceptual advances and by the confirma tion and augmentation of earlier findings that were widely ignored for being contro versial or inexplicable. To survey the state of this active field, a conference was held in West Berlin in August 1985 that attempted to cover all of the new approaches to the study of brain function. The approaches and emphases were very varied: basic and applied, electric and magnetic, EEG and EP/ERP, connectionistic and field, global and local fields, surface and multielectrode, low frequencies and high frequencies, linear and non linear. The conference comprised sessions of invited lectures, a panel session of seven speakers on "How brains may work," and a concluding survey of relevant methodologies. The conference showed that the combination of concepts, methods, and results could open up new important vistas in brain research. Included here are the proceedings of the conference, updated and revised by the authors. Several attendees who did not present papers at the conference later ac cepted my invitation to write chapters for the book.
Author: Dietmar Plenz Publisher: John Wiley & Sons ISBN: 3527651020 Category : Computers Languages : en Pages : 592
Book Description
Leading authorities in the field review current experimental and theoretical knowledge on criticality and brain function. The book begins by summarizing experimental evidence for criticality and self-organized criticality in the brain. Subsequently, important breakthroughs in modeling of critical neuronal circuits and how to establish self-organized criticality in the brain are described. A milestone publication, defining upcoming directions of research in this new fi eld and set to become the primary source of information on the brain and criticality.
Author: Peter Århem Publisher: World Scientific ISBN: 9814494488 Category : Science Languages : en Pages : 284
Book Description
The main aim of this book is to raise and clear up the intriguing problems of noise and chaos in the nervous system. What functional role do fluctuations in neural systems play? Are there chaotic processes in the brain? What is the neural code, and how robust is it towards noise? Are there mechanisms that can control noise and chaos? The book provides an introduction to this new and hot field of research, and at the same time brings the reader to the forefront of scientific inquiry. It is intended primarily for biologists involved in theoretical treatment and for physicists with an interest in biology, but the overview character of the articles makes it also well suited for a broader readership. Contents:Disorder versus Order in Brain Function — An Introduction (P Århem et al.)A Primer on Noise and Chaos (C Blomberg)Molecular Background to Neural Fluctuations: An Introduction to Ion Channel Kinetics (P Århem)What Causes Ion Channel Proteins to Open and Close? (L Liebovitch & A Todorov)Noise in Neural Computation (D Smetters)Do Neurons Recognize Patterns or Rates? One Example (F Moss & H Braun)A Physicist's View of Brain Functioning: Coherence, Chaos, Pattern Formation, Noise (H Haken)Fluctuations in the Coordination Dynamics of Brain and Behavior (S Kelso)Brains Create Macroscopic Order from Microscopic Disorder by Neurodynamics in Perception (W Freeman)Some Randomness Benefits a Model of Hippocampal Function (W Levy & X-B Wu)Consciousness, Schemata and Language (R Cotterill) Readership: Graduate students, academics and research scientists in chaos/dynamical systems and neuroscience. Keywords:Determinism;Indeterminism;Stochastic Process;Fluctuations;Noise;Chaos;Neural Code;Neural Network;Neurodynamics;Ion Channel Kinetics
Author: Erol Başar
Author: Erol Başar
Author: Erol Başar
Author: K Lehnertz
Author: Dennis W Duke
Author: Walter J. Freeman
Author: Erol Başar
Author: Peter rhem
Author: Theodore Melnechuk
Author: Dietmar Plenz
Author: Peter Århem