Why do we need to compute power spectral density for eeg signal?

Hi everyone! I come from VietNam, I'm doing the thesis "detection of epilepsy by using network neural, DWT", but i dont understand why must compute PSD(power spectral density) and entropy, what does it have role? if you know or have documents,let's share for me, please!

Thank you very much!

Answer 1

[Greg Heath]

The obvious answer is that the presence of epilepsy is indicated by peaks in the PSD in certain frequency intervals.