Polygraph: m. called erroneously " 34 lie detector; is a device that records a set of physiological variables in the body of a person who is subjected to cross-examination for having allegedly committed a crime.
IT IS A SCIENTIFIC INSTRUMENT MEASURINGS AND ULTRASENSITIVE THAT MEASURE PHYSIOLOGICAL REACTIONS THAT ARE THE RESULT OF A STIMULUS THROUGH BREATHING, THE GALVANIC SKIN RESPONSE AND THE HEART.