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Titolo: SPLINE LAPLACIAN ESTIMATE OF EEG POTENTIALS OVER A REALISTIC MAGNETICRESONANCECONSTRUCTED SCALP SURFACE MODEL
Autore: BABILONI F; BABILONI C; CARDUCCI F; FATTORINI L; ONORATI P; URBANO A;
 Indirizzi:
 UNIV ROMA LA SAPIENZA,INST HUMAN PHYSIOL,DIV HIGH RESOLUT EEG,PLE A MORO 5 I00185 ROME ITALY
 Titolo Testata:
 Electroencephalography and clinical neurophysiology
fascicolo: 4,
volume: 98,
anno: 1996,
pagine: 363  373
 SICI:
 00134694(1996)98:4<363:SLEOEP>2.0.ZU;2T
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 MOVEMENTRELATED POTENTIALS; HUMAN HEAD; INTERPOLATION; CORTEX;
 Keywords:
 HIGH RESOLUTION EEG; MRCONSTRUCTED SCALP SURFACE MODEL; REALISTIC SPLINE LAPLACIAN; SIMULATED EEG POTENTIALS; SCALPRECORDED EVENTRELATED POTENTIALS;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Citazioni:
 43
 Recensione:
 Indirizzi per estratti:



 Citazione:
 F. Babiloni et al., "SPLINE LAPLACIAN ESTIMATE OF EEG POTENTIALS OVER A REALISTIC MAGNETICRESONANCECONSTRUCTED SCALP SURFACE MODEL", Electroencephalography and clinical neurophysiology, 98(4), 1996, pp. 363373
Abstract
This paper presents a realistic Laplacian (RL) estimator based on a tensorial formulation of the surface Laplacian (SL) that uses the 2D thin plate spline function to obtain a mathematical description of a realistic scalp surface. Because of this tensorial formulation, the RL does not need an orthogonal reference frame placed on the realistic scalp surface. In simulation experiments the RL was estimated with an increasing number of ''electrodes'' (up to 256) on a mathematical scalp model, the analytic Laplacian being used as a reference. Second and third order spherical spline Laplacian estimates were examined for comparison. Noise of increasing magnitude and spatial frequency was added tothe simulated potential distributions. Movementrelated potentials and somatosensory evoked potentials sampled with 128 electrodes were used to estimate the RL on a realistically shaped, MRconstructed model of the subject's scalp surface. The RL was also estimated on a mathematical spherical scalp model computed from the real scalp surface. Simulation experiments showed that the performances of the RL estimator were similar to those of the second and third order spherical spline Laplacians. Furthermore, the information content of scalprecorded potentials was clearly better when the RL estimator computed the SL of the potential on an MRconstructed scalp surface model.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/07/20 alle ore 06:22:29