Skip to main content
Log in

Simulation of EEG: dynamic changes in synaptic efficacy, cerebral rhythms, and dissipative and generative activity in cortex

  • Article
  • Published:
Biological Cybernetics Aims and scope Submit manuscript

Abstract.

A simulation of electrocortical activity based upon coupled local aggregates of excitatory and inhibitory cells was modified to include rapid dynamic variations of synaptic efficacy attributable to reversal potentials and related effects. The modified simulation reproduces the rhythmic phenomena observed in real EEG, including the theta, alpha, beta and gamma rhythms, in association with physiologically realistic pulse densities. At high levels of cortical activation, generative activity with a 40-Hz center frequency emerges, suggesting a basis for the occurrence of phase changes and “edge of chaos” dynamics. These local oscillation properties complement the dissipative travelling wave and synchronous oscillation effects attributable to longer range excitatory couplings, as previously demonstrated in related simulations. Results of variation of parameters provide a first approximation to the anticipated effects of slow physiological time variations in gains and lags, and some predictions of the model are described.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Author information

Authors and Affiliations

Authors

Additional information

Received: 25 May 1998 / Accepted in revised form: 1 March 1999

Rights and permissions

Reprints and permissions

About this article

Cite this article

Wright, J. Simulation of EEG: dynamic changes in synaptic efficacy, cerebral rhythms, and dissipative and generative activity in cortex. Biol Cybern 81, 131–147 (1999). https://doi.org/10.1007/s004220050550

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/s004220050550

Keywords

Navigation