The motor cortex is responsible for one’s voluntary facial expression. An example of this is winking at someone. If an expression is done involuntarily, than lower parts of the brain send impulses to the facial nucleus, which than either permit the contraction or the relaxation of the muscle. This happens when your face muscles contract in a moment of fear... displayed 300 characters
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This happens when your face muscles contract in a moment of fear. You have no control over it. (Ekman, medium) This explanation brings us to Darwin, the first scientist who conducted research on this topic. His inhibition hypothesis states “[…] if you cannot voluntarily activate a muscle, then you will not be able to voluntarily inhibit its involuntary activation in a spontaneous emotional expression... displayed next 300 characters
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