DC trend or DC drift artifact

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moreno sylvain

DC trend or DC drift artifact

Post by moreno sylvain »

Dc trend from the signal.

we are using biosemi system to recording the datas and Brain analyzer to analyse them.
we have find a transformation in brain analyzer that correct the global trend, it is called "DC-retrend". (Brain analyzer are using the global trend correction that is described in Hennighausen et al. (1993))

we are asking us questions ?

1. Do you think that a correction is essential with the biosemi system ?

2. Wath is the the best things to do : to applicate this transformation all the time for all subjects or to make it just when the signal of one subject is very bad ?

3. what is the best time in the analysis to make this transformation ?(exemple : before or after the segmentation of the signal?)

thank you in advance

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