polygraph /poly·graph/ (pol´e-graf) an apparatus for simultaneously recording blood pressure, pulse, and respiration, and variations in electrical resistance of the skin; popularly known as a lie detector.
polygraph
detector [de-tek´ter]
polygraph
pol·y·graph (p l  -gr f )n. An instrument that simultaneously records changes in physiological processes such as heartbeat, blood pressure, and respiration. |
polygraph
[pol′ē·graf]
Etymology: Gk, polys + graphein, to write
the most common type of lie detector.
Polygraph
Commonly called a lie detector. An instrument that measures and records a test subject’s sympathetic nervous system responses—pulse, blood pressure, galvanic skin conductance due to sweating, breathing rhythms, and temperature—to a series of questions, on the premise that true and false answers produce distinctive patterns of response.
detector [de-tek´ter]
a device by which an object or condition can be discovered.
image detector any recording medium used in radiology, such as film or a cathode ray tube.
lie detector polygraph.
polygraph
an apparatus for simultaneously recording several mechanical or electrical impulses, such as blood pressure, pulse and respiration, and variations in electrical resistance of the skin.
polygraph
Lie detector A device designed to detect deception by evaluating physiologic responses to various spoken questions, measuring and recording changes in electrical and mechanical impulses in various parameters–eg, bp,
respiratory rate, galvanic skin reflex
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