Different methods are compared for the evaluation of the event related synchronization (ERS) in the beta rhythm corresponding to finger movements. In addition to the standard procedure usually employed, the realistic Surface Laplacian (SL) is here introduced to improve the spatial localization of the phenomenon, while a Wavelet Packet (WP) decomposition approach is intended to better detect the time dependent characteristics. The parameters of interest (ERS amplitude and latency) were statistically analyzed through Analysis of Variance (ANOVA) and Scheffe's test. The WP filtering results are well comparable with the traditional filtering procedure. On the other hand, the realistic SL considerably improves the spatial localization and the consistency of the estimation (decreased variance) of the ERS amplitude.
Time frequency analysis and spatial filtering in the evaluation of beta ERS after finger movement / A. M., Bianchi; G., Foffani; S., Cerutti; Babiloni, Claudio; P. M., Rossini; Carducci, Filippo; Babiloni, Fabio; Cincotti, Febo. - 23:(2001), pp. 990-993. (Intervento presentato al convegno 23rd Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society tenutosi a ISTANBUL, TURKEY nel OCT 25-28, 2001).
Time frequency analysis and spatial filtering in the evaluation of beta ERS after finger movement
BABILONI, CLAUDIO;CARDUCCI, Filippo;BABILONI, Fabio;CINCOTTI, FEBO
2001
Abstract
Different methods are compared for the evaluation of the event related synchronization (ERS) in the beta rhythm corresponding to finger movements. In addition to the standard procedure usually employed, the realistic Surface Laplacian (SL) is here introduced to improve the spatial localization of the phenomenon, while a Wavelet Packet (WP) decomposition approach is intended to better detect the time dependent characteristics. The parameters of interest (ERS amplitude and latency) were statistically analyzed through Analysis of Variance (ANOVA) and Scheffe's test. The WP filtering results are well comparable with the traditional filtering procedure. On the other hand, the realistic SL considerably improves the spatial localization and the consistency of the estimation (decreased variance) of the ERS amplitude.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
