Muscle activity can fake the effect of high-frequency EEG-neurofeedback

• Autorzy: Jurewicz K. , Paluch K. , Rogala J. , Mikicin M. , Krauz R. , Kublik E. , Wrobel A.
• Języki publikacji: EN

Abstrakty

EN

AIM: EEG-based neurofeedback trainings (EEG-NFB) belongs to a broader category of biofeedback techniques aimed to alter various physiological parameters such as heart rate (ECG-feedback), muscle tension (EMG-feedback) etc., with help of continuous feedback provided in a form of sensory information about the current value of a particular parameter. During EEG-NFB training EEG is recorded and the power of chosen frequency bands is fed back to a trainee in a form of sensory information. The trainings are founded on the assumption that one can learn to change the content of his/her EEG spectrum. In our experiment we aimed to verify the effectiveness of such training and study its mechanisms. METHODS: We chose to train healthy young participants to voluntarily up-regulate (n=6) and down-regulate (n=6) their beta band (15–22 Hz) amplitude recorded from the scalp electrodes placed at frontal and parietal positions (F3, F4, P3, P4) during visually guided monitor-play. As a control we used sham group (n=7), which feedback signal wasn’t related to recorded EEG but generated by the algorithm. RESULTS: We found that NFB training directed to this frequency band was inefficient – we did not observe any modification of the EEG beta band amplitudes neither within nor across the sessions of EEG-NFB. Instead, we observed training-induced increase of highfrequency activity of muscle origin (recorded by the same EEG electrodes) in three participants from group trained to up-regulate beta. CONCLUSIONS: In these cases EMG-driven effects were perceived as the true positive effect of EEG-NFB by trainers and trainees. Importantly, if the data were analyzed and presented according to the standards prevailing in the current EEG-NFB literature, the result of the study could be presented as positive, i.e. up-regulation of the beta band would be claimed successful. Supported by the Polish National Science Centre grant 2012/07/B/ NZ7.

• Wydawca: -
• Czasopismo: Acta Neurobiologiae Experimentalis
• Rocznik: 2015
• Tom: 75
• Numer: Supl.
• Opis fizyczny: p.S77-S78

Twórcy

autor

Jurewicz K.

• Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland

autor

Paluch K.

• Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland

autor

Rogala J.

• Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland

autor

Mikicin M.

• University of Physical Education, Warsaw, Poland

autor

Krauz R.

• Military University of Technology, Warsaw, Poland

autor

Kublik E.

• Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland

autor

Wrobel A.

• Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland