[Eeglablist] Channel location file - 64 channels 10/20

[arno]

Mayuresh Korgaonkar wrote:
> Thanks Arno!!
>  
> I tried doing that. However the channel locations for VEOG and HEOG 
> were missing. Infact there was warning in the command window saying 
> that VEOG and HEOG locations were not found. Is it valid to proceed 
> with the analysis without these channel locations. I am planning to 
> reject the ICA components using the maps.
Yes, it is valid to start without these channels. Their position is not 
as standardized as the other ones anyway. I have their standard position 
and could add them to the template file. I am still wondering if it is a 
good idea. Then users might not remove them before performing source 
modeling (and given that their position is imprecise and that the brain 
model is quite inaccurate for the face, they should not be used for 
dipole modeling). Also, most people still record these channels as 
bipolar channels (not using the same reference as other channels), so 
they should not be plotted along other channels in scalp maps. In case 
they are bipolar channels, they should not be used either to compute ICA 
(although if they are, it is not a big deal because ICA should be able 
to "reconstruct" the common reference for these channels (in one 
component)).

Best,

Arno