To amplify and record the activity of the neurons and summary slow potentials, breathing, and the myogram of the hind paws, on which the electrocutaneous shock was applied, the following devices were used: biopotential amplifiers
BPA1 or BPA2, the Universal electrophysiological device UEF1-03 (constructed by the Central Construction Bureau of Universal Devices of the Russian Academy of Sciences), and an 8-channel ink-writer (USCH8-03).