ABSTRACT
Human body or imagery movement can cause a change in the neuronal activity in the primary sensorimotor areas. A lot of oscillations originate from the sensory motor cortex. Event-Related Synchronization (ERS) in the gamma (γ) band and Event-Related Desynchronization (ERD) in the mu (μ) and beta (β) bands of the EEG develops in the brain during imagination or body-part movement. The γ ERS and the μ-β ERD occur at the contralateral side of the brain near the somatosensory and motor cortex areas during particular limb movement. In case of ERS the power of the γ component increases, while in case of ERD the power of the μ-β component decreases. However BCI research is relevant only to the μ rhythm (8-13 Hz) and the central β rhythm (13-30 Hz)(Stankevich & Spitsyn, 2015, Duan, et al., 2014).
