EEG pre-processing steps

Hi, I just want to the exact step in pre-processing EEG signal.

Step 1: convert time-based data into frequency-based data

Step 2: filter the signal to make sure only the wanted frequency is available (eg: 0.5 Hz - 50 HZ)

Step 3: remove any artifacts

Step 4: Divide the clean signal into 4 bands (alpha, beta, theta, delta)

Is these steps correct?

Answer 1

[Matt Gaidica]

What is the goal of your overall analysis? I think the Chronux Toolbox might help you, although, if you just want to get a Fourier analysis, it only takes a few lines of code.

In general, I would modify your protocol:

1. Detect and remove artifacts in raw data.
2. Filter raw data based on frequency range of interest (address 50/60 Hz line noise if necessary)
3. Perform time-frequency analysis.

Provide more information about what you want to do.

Answer 2

[Kosai]

the Steps are correct but additional to the 4th one : GAMMA-Band must be extracted also ....

[Sepa Abdelrazek]

can you please tell me how to perform the steps by codes on a data set

[Rasa]

@Sepa Abdelrazek, Do you have the code to perform the steps ?