Specific local sites in activity of the brain during listening to music

In recent years, brain function information is obtained a simplified with the development of bio-signals acquisition technology, information of brain function has been a significant contribution in the medical field. This paper proposes a method to determine notable measurement points in order to observe effectively the brain function information. The method that determine of notable measurement channels use principal component analysis. Principal component analysis is used to calculate the comprehensive change in brain activity. In addtion, this method define feature quantity as influential magnitude in brain by using the basis vector of principal component. Notable channel calculate as amount of activity using defined feature quantity. The Feature quantity is magnitude of brain variation in difference of measurement surround. By using feature quantity, this paper determine notable channel.