You searched for: “concentric needle electrodes
coaxial needle electrode, concentric needle electrode (s) (noun); coaxial needle electrodes, concentric needle electrodes (pl)
A recording electrode consisting of an insulated metal wire inside a hollow stainless steel cannula.

Differences in potential are measured using the needle shaft as a reference and the wire tip as the exploring electrode.

This entry is located in the following units: centro-, centr-, centri-, kentro- (page 4) electro-, electr-, electri- (page 2)