Scalp Current Density Mapping: Value and Estimation from Potential Data
- 1 April 1987
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Biomedical Engineering
- Vol. BME-34 (4), 283-288
- https://doi.org/10.1109/tbme.1987.326089
Abstract
Scalp current density (SCD) makes possible the identification of scalp sources and sinks of current. SCD is reference independent and its peaks and troughs are sharper than those of the scalp potential (SP). SCD, by comparison to SP, reflects mainly the activity of cortical generators. SCD mapping appears to be a valuable tool to spatially split smeared SP distribution due to simultaneously active generators. The SCD map may be computed from any sufficiently smooth mathematical SP map. An evaluation of the error of SCD estimation is given for a surface spline method of interpolation of SP. An example of the simultaneous use of SP and SCD in the analysis of somatosensory evoked data is given.Keywords
This publication has 8 references indexed in Scilit:
- Mapping of scalp potentials by surface spline interpolationElectroencephalography and Clinical Neurophysiology, 1987
- Localization of visually evoked cortical activity in humans.The Journal of Physiology, 1985
- Analysis of the Electromagnetic Signals of the Human Brain: Milestones, Obstacles, and GoalsIEEE Transactions on Biomedical Engineering, 1984
- On-line source-density computation with a minimum of electronsElectroencephalography and Clinical Neurophysiology, 1983
- Location of Sources of Evoked Scalp Potentials: Corrections for Skull and Scalp ThicknessesIEEE Transactions on Biomedical Engineering, 1981
- Source derivation in clinical routine EEGElectroencephalography and Clinical Neurophysiology, 1980
- An on-line transformation of EEG scalp potentials into orthogonal source derivationsElectroencephalography and Clinical Neurophysiology, 1975
- Interpolation using surface splines.Journal of Aircraft, 1972