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EEG recording before and after smoking pot    12 02, 2015

In the before trajectory in the video above we can see the EEG brain waves recording of the person who is in a resting state, before smoking. The trajectory contains 14 recordings, each from a different electrode [the electrodes are equally divided between the two cerebral hemispheres]. In the after representation of the trajectory, we have the EEG recording of post-smoking brain waves. You can easily see that the second trajectory is completely different to the first, as the changes appear on both a morphological wave level (bigger amplitude, typical aspect) and rhythm level (higher frequency, chaotic aspect). The participant is in the same resting state as in the beginning, which is why the EEG changes happened due to the impact the ingested substances have on the brain.