To the best of my basic knowledge (and as mentioned here already) EEG isn't going to be super-useful for a consumer device like this ... HEG (infrared detection

To the best of my basic knowledge (and as mentioned here already) EEG isn't going to be super-useful for a consumer device like this ... HEG (infrared detection of oxygen levels) is a better option in terms of the ratio of easy hookups to meaningful (mass market) results.