Source Modeling

  • Sara Gonzalez Andino
  • Rolando Grave de Peralta Menendez
  • Bob W. van Dijk
  • Jan C. De Munck
  • Thomas Knösche
Part of the Springer Series in Synergetics book series (SSSYN)

Abstract

Electroencephalography (EEG) is the measurement of the potential difference between two electrodes attached to the head, as a function of time. Usually, multiple channels are recorded with respect to a-common reference electrode. Since the EEG is generated by electrical activity of the brain, a study of EEG signals may reveal the functioning of the brain. Similarly, the Magneto Encephalogram (MEG), which is the magnetic induction field corresponding to the electrical brain activity, can be recorded to study brain function. Although the generation mechanisms of EEG and MEG are very similar, the measurement of MEG is much more involved than EEG because the magnetic field of the brain is only very weak (O(10¯13 T)). The EEG can be recorded with electrodes and quite common electrical amplifiers, whereas for the MEG one needs SQUIDS (Super Conducting Quantum Interference Device) and usually a magnetically shielded room.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Sara Gonzalez Andino
    • 1
  • Rolando Grave de Peralta Menendez
    • 1
  • Bob W. van Dijk
    • 2
  • Jan C. De Munck
    • 2
  • Thomas Knösche
    • 3
  1. 1.Functional Brain Mapping Lab., Dept. of NeurologyGeneva University HospitalGeneva 14Switzerland
  2. 2.MEG Center KNAWAZVU Rec. CAmsterdamThe Netherlands
  3. 3.Max-Planck-Institute of Cognitive NeuroscienceLeipzigGermany

Personalised recommendations