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Updated: Aug 24, 2026

Functional Mapping with Simultaneous MEG and EEG
Published on: June 15, 2010
Brain mapping: a contribution to linear interpolation
1Consejo Nacional de Investigaciones Cientificas y Técnicas (CONICET), Instituto de Ingenieria Biomedica, Facultad de Ingenieria, UBA.
Abstract:
Topographic mapping of brain electrical activity has become a powerful tool in neurological diagnosis. Maps are obtained from a reduced number of actual measurements by means of mathematical interpolation. Most of these systems use linear combination of the values measured and, in spite of its importance, the choice of the exponent "n" in the weighting function is made ad hoc. In this paper we present a critical analysis of such method and propose an objective criterion for the estimation of that exponent. As well, we propose another criterion for determining the number of leads used in the interpolation of each point.

