AMA CPT® Assistant - 2012 Issue 11 (November)

Autonomic Nervous System Function Testing (November 2012)

November 2012 pages 6-9 Autonomic Nervous System Function Testing The autonomic nervous system controls involuntary activities, such as blood pressure and heart beat. This system consists of a network of nerves divided into two parts: 
parasympathetic nervous system and sympathetic nervous system. The two systems act together, and normally, balance each other. The parasympathetic system predominates during times of relaxation, acting to conserve and restore energy. The sympathetic nervous system prepares the body to cope, during times of stress. To regulate or maintain blood pressure and heart rate when an individual is in different positions (eg, standing up, lying...

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