Todays blogger is Kristen
Yawning has to do with your brain. When yawning it bypasses the known brain circuitry.
This circuitry is called the “mirror-neuron system,” because it contains special type of brain cells or neurons that becomes active when either the owner does it or when he or she senses someone else doing so. Mirror neurons typically happen when a person consciously imitates an action of someone elses. But they seem to play no role in yawn contagiousness.
Source: http://www.world-science.net/exclusives/050309_yawnfrm.htm
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