[Eeglablist] ICA with bad electrodes
Paolo Andre
anp at dfb.unipi.it
Fri Nov 14 09:24:58 PST 2008
Dear all,
a discussion arised in our lab (between biologists and engineers) whether,
having some (in the order of 10 out of 64 ) very bad channels producing a
lot of different artifacts due two high impedance, bad skin contact or
movement, the more correct and succesfull solution is:
A: to eliminate such channnels (and eventually the controlateral
symmetrical ones) from the dataset before performing ICA , thus reducing
the number of channels recorded or
B: perfoming ICA on the all dataset hoping that ICA will segregate bad
channels in separate components.
A further question: theoretically is it better to have symmetrical
distributed electrodes for example on the right left side of the brain or
ICA works as well with unbalanced montages?
Can somebody help. Best Paolo
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