Fun Facts about the name Lany. How many people with the first name Lany have been born in the United States? From 1880 to 2015, the Social Security Administration has recorded 46 babies born with the first name Lany in the United States.
Medical Definition of Sympathetic nervous system. Sympathetic nervous system: A part of the nervous system that serves to accelerate the heart rate, constrict blood vessels, and raise blood pressure. The sympathetic nervous system and the parasympathetic nervous system constitute the autonomic nervous system. Last Editorial Review: 5/13/2016.
Both the sympathetic nervous system (SNS) and parasympathetic nervous system (PSNS, or occasionally PNS) are part of the autonomic nervous system (ANS or visceral nervous system or involuntary nervous system).he sympathetic nervous system is one of the three parts of the ANS. The main purpose of the SNS is to activate the response of the body during stressful situations, including the fight-or-flight mechanism of the body.