tetanomotor

from The Century Dictionary.

• noun An instrument devised by Heidenhain for stimulating a nerve mechanically by causing an ivory hammer attached to the vibrating spring of an induction-machine to beat upon it.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Physiol.) An instrument from tetanizing a muscle by irritating its nerve by successive mechanical shocks.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun physiology An instrument for tetanizing a muscle by irritating its nerve with successive mechanical shocks.