title: Exploiting Task Constraints for Self-Calibrated Brain-Machine Interface Control Using Error-Related Potentials.
abstract: 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.
authors.affiliation: Chair in Brain-Machine Interface (CNBI) and Center for Neuroprosthetics (CNP), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Instituto de Investigación en Ingeniería de Sistemas (I3A), Universidad de Zaragoza, Zaragoza, Spain.
authors.forename: Iñaki
authors.initials: I
authors.lastname: Iturrate
authors.affiliation: Flowers Team, a joint Inria-Ensta ParisTech lab, Bourdeaux, France.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Grizou
authors.affiliation: Instituto de Investigación en Ingeniería de Sistemas (I3A), Universidad de Zaragoza, Zaragoza, Spain.
authors.forename: Jason
authors.initials: J
authors.lastname: Omedes
authors.affiliation: Flowers Team, a joint Inria-Ensta ParisTech lab, Bourdeaux, France.
authors.forename: Pierre-Yves
authors.initials: PY
authors.lastname: Oudeyer
authors.affiliation: Flowers Team, a joint Inria-Ensta ParisTech lab, Bourdeaux, France.
authors.forename: Manuel
authors.initials: M
authors.lastname: Lopes
authors.affiliation: Instituto de Investigación en Ingeniería de Sistemas (I3A), Universidad de Zaragoza, Zaragoza, Spain.
authors.forename: Luis
authors.initials: L
authors.lastname: Montesano
mesh_terms: D000328:Adult; D000465:Algorithms; D001921:Brain / Q000502:physiology*; D062207:Brain-Computer Interfaces / Q000592:standards*; D002138:Calibration; D005071:Evoked Potentials; D006801:Humans; D016013:Likelihood Functions