Facial muscle activity

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Purpose: Facial expressions are formed by the coordination of facial muscles and reflect changes in emotion. Nurses observe facial expressions as way of understanding patients. This study conducted basic research using facial myogenic potential topography to visually determine changes in the location and strength of facial muscle activity associated with voluntary facial expression to examine relationships with facial expressions. Methods: Participants comprised 18 healthy adults 6 men, 12 women; mean age, Facial myogenic potentials were measured from 19 electrodes arranged concentrically on the face, and topographic analysis was conducted.
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Perception of Discrete Emotions in Others: Evidence for Distinct Facial Mimicry Patterns

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Facial electromyography - Wikipedia

Casaccia 1 , E. Sirevaag 2 , M. Frank 4 , J. O'Sullivan 3 , L. Scalise 1 and J. Rohrbaugh 2.
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Facial electromyography

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Facial muscle activities are essential for the appearance and communication of human beings. Given the irregular shape of the facial muscles as well as their different locations, it should be difficult to detect the activities of whole facial muscles with a few electrodes. The electrodes were arranged in rectangular arrays covering the forehead and cheek regions of the face. The experimental results showed that the activation patterns of facial muscles were distinct during doing different facial movements and the activated muscle regions could be clearly observed. Moreover, two features of the activation patterns, 2D correlation coefficient corr2 and Centre of Gravity CG were extracted to quantify the spatial symmetry and the location of activated muscle regions respectively.
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