Default electrode positions

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1

Greetings,

I have an EEG subject from a standard extended 1020 64-Ch cap and no
digitized electrodes. I'd like to create a forward solution from this data.
Are there any default electrode positions available?

Best wishes,

Vincent Rupp Jr
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Hi Vincent,

You might try the biosemi cap default coordinates. This link has several
sheets, one of which is for the 64 channel cap, which has 3 fudicials and
64 eeg channels.

Position coordinates <http://www.biosemi.com/download/Cap_coords_all.xls>

Hope that helps.

-Alan

3

Hi Matti,

We do have digitizer data for biosemi cap but it's been digitized with a
brainsight polaris system. That does give us fiducials plus electrode
positions; can that be easily warped to another subject's head? As Alan
says, we have standard positions as well.

Best wishes,

Vincent Rupp Jr