In the context of recording brain-related electrical activity, electrodes are composed of a conducting metal of one sort or another. In general, the best sort of electrode to use when recording 5-30 microvolt activity, are those made of silver/silver chloride. These reduce the ever-present limitation of the detection of activity in certain amplitude ranges.

There are two general sorts of electrodes employed in EEG recording: intracranial electrodes and scalp electrodes.

E*lec"trode (?), n. [Electro- + Gr. way, path: cf. F. 'electrode.] Elec.

The path by which electricity is conveyed into or from a solution or other conducting medium; esp., the ends of the wires or conductors, leading from source of electricity, and terminating in the medium traversed by the current.


© Webster 1913.

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