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Affective computing
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=====Overview===== The surface of the human face is innervated with a large network of blood vessels. Blood flow variations in these vessels yield visible color changes on the face. Whether or not facial emotions activate facial muscles, variations in blood flow, blood pressure, glucose levels, and other changes occur. Also, the facial color signal is independent from that provided by facial muscle movements.<ref name="face">{{cite journal | last1=Benitez-Quiroz | first1=Carlos F. | last2=Srinivasan | first2=Ramprakash | last3=Martinez | first3=Aleix M. | title=Facial color is an efficient mechanism to visually transmit emotion | journal=Proceedings of the National Academy of Sciences | volume=115 | issue=14 | date=2018-03-19 | doi=10.1073/pnas.1716084115 | pages=3581β3586| pmid=29555780 | pmc=5889636 | bibcode=2018PNAS..115.3581B | doi-access=free }}</ref>
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