Determination of optimal frequency ranges using common spatial pattern images

In this paper we present brain maps constructed for Visualization of Arrow Movement (VAM) mental tasks with EEG signals recorded from 20 locations on the scalp. Method of Common Spatial Patterns (CSP) is employed to generate the spatial maps after filtering raw EEG signals into nine different frequency bands. Separate CSPs were obtained for six subjects who participated in this study. These brain maps show distinct spatial patterns that can be used for distinguishing two mental tasks in VAM. For every subject, optimal frequency range which is useful in distinguishing mental tasks in VAM was obtained.