Short-term meditation training alters brain activity and sympathetic responses at rest, but not during meditation.

Post-intervention changes in EEG power in other frequency bands did not reach statistical significance based on the cluster-based permutation test.

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To summarize, we observed that after training, the meditator group showed a trend towards an increase in EEG power across a wide frequency range during meditation, but there were no significant changes in the dynamics of the EEG and PPG indices in the process of meditation after the course.

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