Mindfulness of Laughter

Enjoyment signals include the Duchenne (authentic) smile, activation of a smile (lip corners pulled obliquely up), and activation of the orbital eye muscles that tighten the lower eyelid and create wrinkling around the outer eye corners (especially with age). Enjoyment also includes vocal signals such as the sound of relief (a sigh or exhalation) and the sound of amusement (laughter or giggling).