Investigating principal component analysis for classification of EEG data

The communication system that does not depend on the brain´s normal output pathways of peripheral nerves and muscles is known as Brain Computer Interaction (BCI). Therefore, BCI system can provide an augmentative communication method for patients with severe motor disabilities. An Electroencephalogram (EEG) is a recording of the very weak (on the order of 5-100 μV) electrical potentials generated by the brain on the scalp. An EEG is recorded as a potential difference between a signal electrode placed on the scalp and a reference electrode (generally connected to one ear or both ears).