When we see nonverbal cues, like facial expressions, body language, and gestures, our brain’s visual processing system kicks into action.
And since our brain is wired to process emotions conveyed by nonverbal cues, the amygdala plays a crucial role.
Things like smiles or frowns quickly get assigned emotional significance since the amygdala uses these cues to assign meaning.
In short, the instinctive response our brain gives these cues influences our own emotions and shapes our reactions to others.