RECORDING ELECTRODE FOR ELECTROPHYSIOLOGICAL SIGNAL MEASUREMENT

摘要

The recording electrode (1) for measuring the electrophysiological signal from biological tissue is particularly suitable for use in magnetic stimulation. This recording electrode is provided with a contact area (2) designed to come into contact with biological tissue by direct contact or through electro-conductive gel to facilitate sensing of the electrophysiological signal from the biological tissue to the contact area (2), where the contact area (2) is electrically connected to the output of the recording electrode (1) for conducting the electrophysiological signal for further processing. The contact area (2) of the recording electrode (1) is divided into at least two separate contact areas (3) electrically separated from each other, each separate contact area (3) being connected to the output of the recording electrode (1) via its own resistor (4), whose electrical resistance is at least 100 Ω, while the resulting resistance of all resistors connecting the individual separate contact areas (3) with the output of the recording electrode (1), as measured between the biological tissue and the output of the recording electrode (1), is at least 50 Ω, which corresponds to at least half the size of the impedance of the biological tissue in magnetic stimulation.