Impact of the baseline temporal selection on the ERD/ERS analysis for Motor Imagery-based BCI - Inria - Institut national de recherche en sciences et technologies du numérique Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

Impact of the baseline temporal selection on the ERD/ERS analysis for Motor Imagery-based BCI

Sébastien Rimbert
  • Fonction : Auteur
  • PersonId : 966448
David Trocellier
Fabien Lotte

Résumé

Motor Imagery-based Brain-Computer Interfaces (MI-BCIs) are neurotechnologies that exploit the modulation of sensorimotor rhythms over the motor cortices, respectively known as Event-Related Desynchronization (ERD) and Synchronization (ERS). The interpretation of ERD/ERS is directly related to the selection of the baseline used to estimate them, and might result in a misleading ERD/ERS visualization. In fact, in BCI paradigms, if two trials are separated by a few seconds, taking a baseline close to the end of the previous trial could result in an over-estimation of the ERD, while taking a baseline too close to the upcoming trial could result in an underestimation of the ERD. This phenomenon may cause a functional misinterpretation of the ERD/ERS phenomena in MI-BCI studies. This may also impair BCI performances for MI vs Rest classification, since such baselines are often used as resting states. In this paper, we propose to investigate the effect of several baseline time window selections on ERD/ERS modulations and BCI performances. Our results show that considering the selected temporal baseline effect is essential to analyze the modulations of ERD/ERS during MI-BCI use.
Fichier principal
Vignette du fichier
EMBC2023.pdf (5.36 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04077693 , version 1 (21-04-2023)

Identifiants

  • HAL Id : hal-04077693 , version 1

Citer

Sébastien Rimbert, David Trocellier, Fabien Lotte. Impact of the baseline temporal selection on the ERD/ERS analysis for Motor Imagery-based BCI. EMBC 2023 - 45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Jul 2023, Sydney, Australia. ⟨hal-04077693⟩

Collections

CNRS INRIA INRIA2
160 Consultations
153 Téléchargements

Partager

Gmail Mastodon Facebook X LinkedIn More