While the wrinkles on the forehead are smoothed out, this is a functional negative. When they become permanent, they no longer smooth out — it turns into an anatomical negative.
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Functional negative — kinesthetics (posture, postures and gestures), speech and intonation, ideas and melodies that provoke the emergence of negative emotions and experiences. Unlike the anatomical negativity embodied in the body and already a bodily feature, the functional negative is a temporary state and can be replaced by a functional positive. The back can be straightened, the voice can be made more cheerful, destructive suggestions can be replaced with positive and constructive ones.