Spontaneous smiles in response to politicians can serve as an implicit barometer for gauging electorate preferences. However. it is unclear whether a subtle Duchenne smile-an authentic expression involving the coactivation of the zygomaticus major (ZM) and orbicularis oculi (OO) muscles-would be elicited while reading about a favored politician smiling. indicating a more positive disp... https://www.ceomelinh.com/product-category/lance/