Beta frequency power

In Fig. 4, NEUT means that the participants in the study were experiencing neutral emotions, NEG indicates that they were experiencing negative emotions, while POS indicates that they were experiencing positive emotions. The black color in the brain map of Fig. 4 illustrates higher power values, while the light gray color indicates lower values. There are four power values from different frequency bands which include the theta, alpha 1, alpha 2, and beta frequencies illustrated in the research of Aftanas et al. (1998). The results of their research provide evidence that the EEG power values of different brain maps could indicate different human emotions. 

For each hour the mean relative power (% of total spectral power) in the subfrequency bands delta, theta, alpha, beta and gamma are estimated during treadmill-on phases. In addition, the ratios between fast (beta and gamma) and slow (delta, theta and alpha) frequencies for the same phases are calculated. 

An increase in absolute power in the delta, theta, alpha-1 and beta-1 frequency was found on administration of both extracts which was more pronounced with the high hyperforin 10 extract and after repeated dosing. The effects reached statistical significance on WS 5572 treatment in the delta and beta-1 range, endorsing the role of hyperforin 10 with respect to central nervous activity of Hypericum extract. 

The results showed that the participants became less vigilant and reported more TUITs over the course of the session. The measures of absolute power in the alpha, beta, and theta frequency bands did not show any differences across the pre-TUIT and post-TUTT intervals. However, significant increases fiom pre-to post-TUIT in the value of two of the power band ratios, beta/(alpha +theta) and beta/alpha, were observed for all parietal lobe sites (Pz, P3, and P4). Cunningham etal. (in press) concluded power band ratios may provide a more sensitive measure of fluctuations in attention than more Iradilional measures of absolute power within any individual frequency band. 

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