Tremors of the smile.
D000328:Adult; D004576:Electromyography; D005149:Facial Expression / Q000502:physiology*; D005152:Facial Muscles / Q000503:physiopathology*; D005260:Female; D006801:Humans; D012904:Smiling / Q000502:physiology*; D014202:Tremor / Q000503:physiopathology*