Electrode

An electrode comprising a barb element adapted to be inserted into an organ of a mammal, a placement element to slidingly engage said organ during insertion of said barb element, and transversely extending connecting means for connecting a first extremity of said barb element and said placement element and lead means electrically connected to said connecting means for connection to an electrical instrument, said barb element including a longitudinally extending shaft and a barb at a second extremity of said barb element, said barb being sharp in a longitudinal direction away from said first extremity for easy insertion into the body of the mammal and blunt in the opposed longitudinal direction to hold said barb in its inserted position, said placement element providing a substantially fixed placement-defining surface extending longitudinally alongside said barb shaft and being transversely spaced therefrom by said connecting means a predetermined amount to gauge and limit the extent of depth of insertment of said barb and the direction of insertion of said shaft into the body and to hold said barb in position and against rotation in said organ, and said barb element and said connecting means being electrically conductive.