Analyses of EEG signals during motor imagery

Ovaj rad se bavi sučeljem mozak- računalo i analizom signala prilikom zamišljanja pokreta ruke i noge. Za snimanje EEG signala je korišten V-Amp uređaj sa 16 elektroda, od kojih je elektroda Cz služila kao referentna točka. Signal je prikupljen i obrađen sa OpenVibe programom i njegovi scenarijima. Za analizu podataka je korišten program Matlab i njegov set alata EEGLAB. U radu je uočeno da se prilikom zamišljanja pokreta ruku javlja ERD a prilikom nogu ERS, te da se pojačanje signala očituje oko 1 do 2 sekunde nakon stimulansa. Najveće aktivnosti prilikom zamišljanja motoričke radnje su primjećene na elektrodama koje se nalaze na primarnom motoričkom korteksu.This paper deals with the Brain-Computer Interface (BCI) and EEG signal analysis of motor imagery of arms and legs. To capture the EEG signal, a V-Amp device with 16 electrodes was used, of which the electrode Cz served as a reference point. The signal was collected and processed with the OpenVibe program and its scenarios. The Matlab program and its EEGLAB tool set were used for signal analysis. In the paper, it was observed that ERD occurs during the motor imagery of arms, and ERS during the legs, and that the amplification of the EEG signal is observed approximately 1 to 2 seconds after the motor imagery stimulus. The major activities during the motor imagery were observed on electrodes located on top of the primary motor cortex