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Inducing transitions in mesoscopic brain dynamics

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Book cover Modeling Phase Transitions in the Brain

Part of the book series: Springer Series in Computational Neuroscience ((NEUROSCI,volume 4))

Abstract

Mesoscopic brain dynamics, typically studied with electro- and magnetoencephalography (EEG and MEG), display a rich complexity of oscillatory and chaotic-like states, including many different frequencies, amplitudes and phases. Presumably, these different dynamical states correspond to different mental states and functions; studying transitions between such states could provide valuable insights into brain—mind relations that should also be of clinical interest. We use computational methods to investigate these transitions, with the objective of finding relations between structure, dynamics, and function. In particular, we have developed models of paleo- and neocortical structures, in order to study their mesoscopic neurodynamics, as a link between the microscopic neuronal and macroscopic mental events and processes. In this chapter, we describe several types of models that emphasize network connectivity and structure, but we also include molecular and cellular properties at varying detail, depending on the particular problem and experimental data available. We use these models to study how phase transitions can be induced in the mesoscopic neurodynamics of cortical networks by internal (natural) and external (artificial) factors. We discuss the models, and relate the simulation results to macroscopic phenomena, such as arousal, attention, anesthesia, learning, and mental disorders.

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Acknowledgments

I would like to thank my co-workers, Peter Århem, Per Aronsson, Soumalee Basu, Yuqiao Gu, Geir Halnes, Björn Wahlund, and Xiangbao Wu. I also appreciate valuable discussions with Hans Braun, Walter Freeman, Hermann Haken, and Frank Moss. Grants from Vinnova and the Swedish Research Council are gratefully acknowledged.

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Authors and Affiliations

  1. Department of Energy and Technology, SLU, Research Group of Biometry and Systems Analysis, Uppsala, SE, 75007, Sweden

    Hans Liljenström

  2. Agora for Biosystems, SE, 19322, Sigtuna, Sweden

    Hans Liljenström

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  1. Hans Liljenström
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Correspondence to Hans Liljenström .

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  1. Dept. Engineering, University of Waikato, Hillcrest Road, Hamilton, 3240, New Zealand

    D. Alistair Steyn-Ross

  2. Dept. Engineering, University of Waikato, Hillcrest Road, Hamilton, 3240, New Zealand

    Moira Steyn-Ross

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Liljenström, H. (2010). Inducing transitions in mesoscopic brain dynamics. In: Steyn-Ross, D., Steyn-Ross, M. (eds) Modeling Phase Transitions in the Brain. Springer Series in Computational Neuroscience, vol 4. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-0796-7_7

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