Nonlinear EEG Analysis Based On a Neural Mass Model

: In this paper the variable that resembled EEG background activity is V 1e . Hence, this is taken as the output of the system. However, this variable does not yet take into account the effect of the amplifiers that are used to record the EEG nor the distortions produced by the different tissue layers between the neural mass and the recording electrode. The effect of the amplifiers of an EEG recording system is filtering of the signal. For the purpose of this paper, a Butterworth filter formed by a cascade of a (second-order) low pass filter and a (first-order) high pass filter will be considered.