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pulsations are recorded by the deflections of pens on a
moving paper chart. Usually the term polygraph refers to
the measurement of changes in autonomic nervous system
activity, although polygraph pens could measure any kind
of activity. In chapter 4 I explained that autonomic nervous
system activities--changes in heart rate,p90x workout book, blood pressure,
skin conductivity,police eyeglasses, skin temperature, and so on--are signs
of emotional arousal. I mentioned that a few of these
changes,police glasses frames, such as increases in respiration, sweating, or facial
flushing and blanching,camo oakley sunglasses, can be observed without the poly-
graph. The polygraph records these changes more accu-
rately, detecting smaller changes than can be seen, and
recording autonomic nervous system activities, such as
heart rate, which are never visible. It does so by amplifying
signals picked up from sensors that are attached to different
parts of the body. In the typical use of the polygraph to
detect lies,diesel jeans wholesale, four sensors are put on the subject. Pneumatic

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