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1917 Amer. Jrnl. Physiol. 44 521 The electrodes were of copper or platinum, the muscle resting on an indifferent plate and subject above to the light contact of an active needle, microscopically sharpened—the micro-electrode.

1955 C. R. N. Strouts et al. Analyt. Chem. II. xviii. 576 A microelectrode usually consists of a platinum wire about 0·5 mm. in diameter, sealed into the side of a glass tube.

1966 T. Pynchon Crying of Lot 49 iii. 55 Something tidal began to reach feelers in past eyes and eardrums, perhaps to arouse fractions of brain current your most gossamer microelectrode is yet too gross for finding.

1989 Brain 113 914 Neural recordings were made using sterile insulated tungsten microelectrodes inserted manually into individual cutaneous fascicles of the median nerve at the wrist.