Analysis Of Relationship Between EEG And Event Basing On PCA

EEG(electroencephalogram) information analysis is now a cutting-edge and popular fundamental research. By researching the eeg information, we can discover most unknown discipline that can account for some phenomenon of human behavior, we can also get hold of the discipline of brain activity and uncover brain's mystery. These researches can be applied to every walk of life and supply Convenience for people's life and productionThe paper obtain the eeg data and analyze the data using the PCA(Principal component analysis) by the three experiments. The paper deduces that the relationship of brain and music, brain and language, brain and attention and supply eeg information for basic experiments and theoretical basis.The paper tested the subjects for 150 person-time and collect data piece for more than 400 by listening music experiments, language experiments, mind counting experiments. The paper disposes the eeg data by PCA, extracts the first principal component, counts the first principal components contribution, and classifies the eeg data by principal components load to obtain the discipline.In the three experiments, by PCA the paper found: In the listening music experiments, the first principal component of listening pleasant music is higher than that of listening unpleasant music. In the frontal, the impact listening to pleasant music of the first principal component of brain electrodes locates at the right frontal, conversely, the impact listening to unpleasant music locate at left frontal. In the language experiments, the first principal component of occipital rises from listening Japanese to Chinese, but from listening Chinese to eyes closed, the first principal component of occipital drops. In the mind counting experiments, the first principal component of mind counting is higher than that of eyes closed, but is much higher than that of eyes closed after mind counting.The listening music experiments show that: In the different music background, the different music can play a different role in the right and left frontals, meanwhile, that can also play a role in the feeling, emotion, mood. In the language experiments, because the brain related to the language is very complicated, the research applying the PCA can't obtain a valid result, but the discipline of occipital a-wave can supply a base for the following researches. The mind counting experiments show that when the brain focuses attention on something, the brain is very activity, the first principal component is obvious higher than other principal components. So that is the reason that people can't be of two minds to do something.