Exploiting Task Constraints for Self-Calibrated Brain-Machine Interface Control Using Error-Related Potentials

Iñaki Iturrate (1, 2, 3) , Jonathan Grizou (4) , Omedes Jason (2) , Pierre-Yves Oudeyer (4) , Manuel Lopes (4) , Luis Montesano (2)

1 CNBI - Chair in Brain-Machine Interface [Geneva]
2 DIIS - Departamento de Informática e Ingeniería de Sistemas
3 CNP - Center for Neuroprosthetics [Geneva]
4 Flowers - Flowing Epigenetic Robots and Systems

This paper presents a new approach for self-calibration BCI for reaching tasks using error-related potentials. The proposed method exploits task constraints to simultaneously calibrate the decoder and control the device, by using a robust likelihood function and an ad-hoc planner to cope with the large uncertainty resulting from the unknown task and decoder. The method has been evaluated in closed-loop online experiments with 8 users using a previously proposed BCI protocol for reaching tasks over a grid. The results show that it is possible to have a usable BCI control from the beginning of the experiment without any prior calibration. Furthermore, comparisons with simulations and previous results obtained using standard calibration hint that both the quality of recorded signals and the performance of the system were comparable to those obtained with a standard calibration approach.

Domaines: Apprentissage [cs.LG]

Iñaki Iturrate, Jonathan Grizou, Omedes Jason, Pierre-Yves Oudeyer, Manuel Lopes, et al.. Exploiting Task Constraints for Self-Calibrated Brain-Machine Interface Control Using Error-Related Potentials. PLoS ONE, 2015, ⟨10.1371/journal.pone.0131491⟩. ⟨hal-01246436⟩