Fundamental research about electroencephalogram (EEG) - Functional Electrical Stimulation (FES) rehabilitation system

Event Related Desynchronization (ERD) which is a specific brain wave of motor imagery is popular in the Brain Computer Interface (BCI) researches. Several researches showed that sensory feedbacks affected ERD, but it is not clear which sensory inputs (tactile, muscular, tendonious and articular) mainly affect ERD.We examined how ERD is affected by the Functional Electrical Stimulation (FES) on both feet for healthy subjects. The results indicated that bigger ERD was extracted as the FES stimulus increase. And bigger ERD was also extracted during the leg free condition than the leg fixed condition. It suggests that the muscular and articular sensations induce ERD on foot motor area (Cz).