(Upper left) An example of an acceleromyograph showing stimulating electrodes over the ulnar nerve and the accelerometry sensor on the thumb. (Upper right) An example of a disposable electromyograph electrode. This is the electrode used in the study by Nemes et al.³  (Lower) An investigator-built mechanomyograph as shown in an article in Anesthesiology in 1976.⁸  A Grass force transducer (now obsolete) is connected to a tongue blade that is taped onto the thumb. The hand is immobilized, and a preload is applied to the thumb.