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1 results

  • 12 - Diffusion Potentials in Brain Tissue

  • Geir Halnes, Norwegian University of Life Sciences, Torbjørn V. Ness, Norwegian University of Life Sciences, Solveig Næss, Universitetet i Oslo, Espen Hagen, Universitetet i Oslo, Klas H. Pettersen, The Norwegian Artificial Intelligence Research Consortium, Gaute T. Einevoll, Norwegian University of Life Sciences
  • Book:
    Electric Brain Signals
    Published online:
    30 May 2024
    Print publication:
    06 June 2024, pp 289-308

  • Summary

    The diffusion of ions in the extracellular space of the brain is normally assumed to have negligible effects on extracellular potentials. However, during periods of intense neural activity or in pathological conditions such as spreading depression, concentration gradients in brain tissue can become quite pronounced, and the effects of diffusion on electric potentials cannot be a priori neglected. We here present the theory for computing diffusion potentials, and we evaluate whether diffusion potentials can become “visible” within the frequency range considered in standard LFP recordings.