Table 1.

Comparison of spike size, advantages and disadvantages of dry electrodes.

Scale	Pros and Cons
nano	Similar impedance as wet electrodes No risk of infection Less artefacts due to motion	Invasive (piercing of SC) Non suitable for hairy sites
micro	Similar impedance as wet electrodes Less artefacts due to motion	Invasive (piercing of SC) Risk of infection Electrode fragility Non suitable for hairy sites
mili	No invasive No Risk of infection Suitable for hairy sites	Higher impedance than wet electrodes Artefacts due to motion