FlexTrodes (US Patent NO. 6,574,513) are simple, clean, self-abrading and self-cleaning, paste-free and gel-free electrodes. They are intended for EEG, EMG, EKG, and related body potential recording work. They are suitable for use to contact and record biopotentials from the head, face, and other body areas. They are especially useful in cases where it is difficult to get a good connection through the hair, and where chemicals, gels, or pastes are undesirable.

FlexTrodes can be used with the BrainMaster recording modules, or with similar instruments such as the WaveRider, BrainTracer, Mind Mirror, POD, and so forth. They can also be used with any physiological instrumentation that expects a conventional, metal/saline type of electrode, with a secure connection to the head, face, or other body area.

FlexTrodes can be used in combination with other electrodes, providing maximum flexibility. Each consists of an adjustable plastic holder, a contact surface, a sponge matrix, and an embedded electrode of gold, silver, stainless-steel, or tin. This assembly fits into a retaining ring that can be affixed to a headband, hat, or other device. The electrolyte is included. The electrode itself is of a typical commercial variety.