The face we present to the world is constantly changing as different combinations of its 42 muscles contract and contort it. Humans can produce thousands of distinct facial expressions ...
As we age, the muscles in our face can begin to lose tone and elasticity, leading to sagging skin, wrinkles, and an overall ...
When the facial nerve fires, the signal is directed to the ipsilateral facial muscles causing muscle contractions in different areas of the face on the same side. A competing hypothesis states that ...
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