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Criticality as a signature of healthy neural systems: multi-scale experimental and computational studies
  • Language: en
  • Pages: 140

Criticality as a signature of healthy neural systems: multi-scale experimental and computational studies

Since 2003, when spontaneous activity in cortical slices was first found to follow scale-free statistical distributions in size and duration, increasing experimental evidences and theoretical models have been reported in the literature supporting the emergence of evidence of scale invariance in the cortex. Although strongly debated, such results refer to many different in vitro and in vivo preparations (awake monkeys, anesthetized rats and cats, in vitro slices and dissociated cultures), suggesting that power law distributions and scale free correlations are a very general and robust feature of cortical activity that has been conserved across species as specific substrate for information sto...

Mathematics of Multiscale Materials
  • Language: en
  • Pages: 290

Mathematics of Multiscale Materials

The 1995-1996 program at the Institute for Mathematics and its Applications was devoted to mathematical methods in material science, and was attended by materials scientists, physicists, geologists, chemists engineers, and mathematicians. This volume contains chapters which emerged from four of the workshops, focusing on disordered materials; interfaces and thin films; mechanical response of materials from angstroms to meters; and phase transformation, composite materials and microstructure. The scales treated in these workshops ranged from the atomic to the macroscopic, the microstructures from ordered to random, and the treatments from "purely" theoretical to highly applied. Taken together, these results form a compelling and broad account of many aspects of the science of multi-scale materials, and will hopefully inspire research across the self-imposed barriers of twentieth century science.

Scale-free Dynamics and Critical Phenomena in Cortical Activity
  • Language: en
  • Pages: 126

Scale-free Dynamics and Critical Phenomena in Cortical Activity

The brain is composed of many interconnected neurons that form a complex system, from which thought, behavior, and creativity emerge through self-organization. By studying the dynamics of this network, some basic motifs can be identified. Recent technological and computational advances have led to rapidly accumulating empirical evidence that spontaneous cortical activity exhibits scale-free and critical behavior. Multiple experiments have identified neural processes without a preferred timescale in the avalanche-like spatial propagation of activity in cortical slices and in self-similar time series of local field potentials. Even at the largest scale, scale-free behavior can be observed by l...

The Functional Role of Critical Dynamics in Neural Systems
  • Language: en
  • Pages: 287

The Functional Role of Critical Dynamics in Neural Systems

  • Type: Book
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  • Published: 2019-07-23
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  • Publisher: Springer

This book offers a timely overview of theories and methods developed by an authoritative group of researchers to understand the link between criticality and brain functioning. Cortical information processing in particular and brain function in general rely heavily on the collective dynamics of neurons and networks distributed over many brain areas. A key concept for characterizing and understanding brain dynamics is the idea that networks operate near a critical state, which offers several potential benefits for computation and information processing. However, there is still a large gap between research on criticality and understanding brain function. For example, cortical networks are not h...

Correlations and Connectivity
  • Language: en
  • Pages: 341

Correlations and Connectivity

Proceedings of the NATO Advanced Study Institute on Propagation of Correlations in Constrained Systems, Cargèse, Corsica, France, July 2-14, 1990

Computer Simulation Studies in Condensed Matter Physics II
  • Language: en
  • Pages: 195

Computer Simulation Studies in Condensed Matter Physics II

A broad overview of recent developments in computer simulation studies of condensed matter systems is provided in this book. Both classical and quantum systems are discussed. The contributions present new physical results and describe new simulation techniques and novel ways of interpreting simulational data. Topics covered include: - parallelization and vectorization - cellular automata, fractals and aggregation - damage spreading - molecular dynamics of proteins and rotating molecules in solids - quantum Monte Carlo studies of strongly correlated electron systems

Disorder and Mixing
  • Language: en
  • Pages: 363

Disorder and Mixing

CARGESE INSTITUfE ON DISORDER AND MIXING Convection, diffusion and reaction are the three basic mechanisms in physico-chemical hydrodynamics and chemical engineering. Both convective and diffusive processes are strongly influenced by the effect of disorder of granular matter in porous media, suspensions, fluidized beds or/and by the randomness caused in turbulent flow field. This book has been initiated by a NATO summer institute held in Cargese (Corsica, FRANCE) from June 15 th to 27 th 1987 . Its aim was to associate statistical physicists, fluid mechanicians and specialists of chemical engineering on the problems of the relation between disorder and mixing and, in this respect, this is a ...

Fractals’ Physical Origin and Properties
  • Language: en
  • Pages: 356

Fractals’ Physical Origin and Properties

  • Type: Book
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  • Published: 2013-12-19
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  • Publisher: Springer

This volume contains the Proceedings of the Special Seminar on: FRAGTALS held from October 9-15, 1988 at the Ettore Majorana Centre for Scientific Culture, Erice (Trapani), Italy. The concepts of self-similarity and scale invariance have arisen independently in several areas. One is the study of critical properites of phase transitions; another is fractal geometry, which involves the concept of (non-integer) fractal dimension. These two areas have now come together, and their methods have extended to various fields of physics. The purpose of this Seminar was to provide an overview of the recent developments in the field. Most of the contributions are theoretical, but some experimental work i...

The Cortex and the Critical Point
  • Language: en
  • Pages: 217

The Cortex and the Critical Point

  • Type: Book
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  • Published: 2022-08-30
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  • Publisher: MIT Press

How the cerebral cortex operates near a critical phase transition point for optimum performance. Individual neurons have limited computational powers, but when they work together, it is almost like magic. Firing synchronously and then breaking off to improvise by themselves, they can be paradoxically both independent and interdependent. This happens near the critical point: when neurons are poised between a phase where activity is damped and a phase where it is amplified, where information processing is optimized, and complex emergent activity patterns arise. The claim that neurons in the cortex work best when they operate near the critical point is known as the criticality hypothesis. In th...

Annual Reviews of Computational Physics I
  • Language: en
  • Pages: 356

Annual Reviews of Computational Physics I

This book series in the rapidly growing field of computational physics offers up-to-date (submitted to the publisher by electronic mail) reviews for the researcher. The first volume, written by authors from four continents, emphasizes statistical physics. For example, Ising problems are reviewed where theoretical approaches led to contradictory approaches and only quality computing answered who is right. In addition, fields as diverse as neural networks, granular materials, and computer algebra are reviewed. The next volume on percolation and other fields is already in preparation. Contents:Computational Aspects of Damage Spreading (N Jan & L de Arcangelis)Monte Carlo Simulations of Dilute I...