A new bipolar electrode for electromyography

I NTRAMUSCULAR ELECTRODES for electromyography must com-bine a maximum of reliability with a minimum of discomfort, and a number of useful ones have been developed and used in the past (I). The most widely used have been bipolar concen-tric needle electrodes of the type first proposed by Adrian and Bronk (2). Recently, as electromyographic studies of normal similar applications. ) The electrode being as fine as a human hair, one may use as the guide the very smallest gauges of hypodermic needle obtainable. The steps for making an electrode, illustrated in Fig. I, are as follows. I) A double strand of the nylon-coated wire is passed through the shaft of a hypodermic needle. A small loop strand of Nylon Distal ends insulation Sta, erad distal ends foldczd- OVQYZ