Talk:Sinoatrial node

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Please help improve this article or section by expanding it. Further information might be found on the talk page or at requests for expansion. (January 2007)

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Yes i have a question. Dose this sinoatrial react to pain, anger, or love and dose it know it.

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Answer: Since the SA node is richly innervated with sympathetic fibers, it will react to any stimulus that can "activate" the sympathetic nervous system (fight-or-flight system). It could be activated by pain, anger, fright, ect. Think about this- any of these things could make your heart suddenly beat faster, and the SA node is the one controlling the beating. As far as "it" knowing what it does... it just reacts to chemical stimulus, as most things in the body do.

does thne SA work poorly if poor blood comes to the heart?

I have a better question. Why is it called the sinoatrial node? I understand the 'atrial' part but not the 'sino' or 'sinus' part of the name. And why isn't this included in the article? —Preceding unsigned comment added by Yahooshua (talk • contribs) 06:40, 14 September 2007 (UTC)