A Modified Design for the Lykken Zinc Electrodes.

As Lykken has so clearly demonstrated, careful choice of skin resistance electrodes is essential for accurate, artifact-free recording (1). The zinc electrodes he describes are of particular interest since they are electrically stable, simple to apply, and require less complicated circuitry than the lead-lead variety. The purpose of this note is to describe a modification of the zinc electrode which has the following advantages: (1) it is simpler to build; described by Lykken. Note, however that the electrodes must be cleaned with water and not with alcohol, since application of alcohol may lead to cracking the lucite body of the electrode. If the electrode is wiped with a tissue immediately after use, even water will rarely be necessary.