Improvement of EEG Signal Acquisition: An Electrical Aspect for State of the Art of Front End

Figure 3

Commercially available EEG electrodes and cap samples; (c) is for invasive applications.

(a) Ag-AgCl electrodes

(b) Active electrodes

(c) Intra-cortical electrode array

(d) EEG caps (left to right: Standard: 256-ch., (me) (Neuroscan) [7], (Neuroscan) [7], (EGI) [8], Active; (Biosemi) [9], Hydrocel (EGI)) [8]