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  2. Facial Action Coding System - Wikipedia

    en.wikipedia.org/wiki/Facial_Action_Coding_System

    The development of FACS tools for different species allows the objective and anatomical study of facial expressions in communicative and emotional contexts. Furthermore, a cross-species analysis of facial expressions can help to answer interesting questions, such as which emotions are uniquely human. [21]

  3. Facial expression - Wikipedia

    en.wikipedia.org/wiki/Facial_expression

    Voluntary facial expressions are often socially conditioned and follow a cortical route in the brain. Conversely, involuntary facial expressions are believed to be innate and follow a subcortical route in the brain. Facial recognition can be an emotional experience for the brain and the amygdala is highly involved in the recognition process.

  4. Social cue - Wikipedia

    en.wikipedia.org/wiki/Social_cue

    However, most tasks that are related to social cognition involve emotional processing, empathy, and social norms knowledge. When dealing with facial expression recognition, recent research has found that people with this disorder are unable to recognize facial expressions that exhibit negative emotions, including fear, sadness, anger, and disgust.

  5. Body language - Wikipedia

    en.wikipedia.org/wiki/Body_language

    Facial expression is an important part of body language and the expression of emotion.It can comprise movement of the eyes, eyebrows, lips, nose and cheeks. At one point, researchers believed that making a genuine smile was nearly impossible to do on command.

  6. Facial feedback hypothesis - Wikipedia

    en.wikipedia.org/wiki/Facial_feedback_hypothesis

    The facial feedback hypothesis, rooted in the conjectures of Charles Darwin and William James, is that one's facial expression directly affects their emotional experience. . Specifically, physiological activation of the facial regions associated with certain emotions holds a direct effect on the elicitation of such emotional states, and the lack of or inhibition of facial activation will ...

  7. Microexpression - Wikipedia

    en.wikipedia.org/wiki/Microexpression

    Looping is where facial expressions can elicit involuntary behavior. In the research motor mimicry there shows neurons that pick up on facial expressions and communicate with motor neurons responsible for muscles in the face to display the same facial expression. Thus displaying a smile may elicit a micro expression of a smile on someone who is ...

  8. Facial muscles - Wikipedia

    en.wikipedia.org/wiki/Facial_muscles

    An inability to form facial expressions on one side of the face may be the first sign of damage to the nerve of these muscles. Damage to the facial nerve results in facial paralysis of the muscles of facial expression on the involved side. Paralysis is the loss of voluntary muscle action; the facial nerve has become damaged permanently or ...

  9. Non-verbal leakage - Wikipedia

    en.wikipedia.org/wiki/Non-verbal_leakage

    In summary, although the face is the most expressive in terms of non-verbal expression, it is also one of the most easily controlled, so its levels of non-verbal leakage can be relatively low with conscious control of facial expressions. [6] Indicators of facial leakage include facial expressions that last too long, that are too intensive, or ...