O no. That's not what brain stuff should look like at all.
Discussion
Replies:
7
@susanleemburg this is pretty awesome though, what was the problem?
@jonny There was a very noisy part of the recording that did this wild peaky stuff (no idea why, I only have the data and very little technical info about it).
The rest of the recording is much more normal, but very low power. Probably because the patient was very ill. The normal EEG just got drowned out by whatever happened earlier...
@susanleemburg huh, i wonder what that harmonic is, it looks (aesthetically) almost like an NMR.
Phew, fixed my code and now things look less mysterious and a lot more brain-like...
I still have no idea where that ~44Hz peak comes from. Some weird aliasing of 60Hz noise perhaps?
@susanleemburg is it at 44.1? does the hardware or software have lineage in audio equipment?
edit: oh wait no the scale is Hz not kHz, nvm
@jonny Something like that yes (it's in the 44-44.25Hz bin anyway).
This data comes from the Harvard EEG database, so I don't actually know too much about the hardware and software. The recordings are just generally pretty messy.
And recorded at 200Hz sampling rate, so some higher frequencies show up a little weird in the spectrum.
