On the function of facial muscles in different behavioral situations. A study based on muscle morphology and electromyography.
D000717:Anatomy, Comparative; D000818:Animals; D001522:Behavior, Animal; D004576:Electromyography; D005149:Facial Expression; D005152:Facial Muscles / Q000502:physiology*; D000882:Haplorhini; D008251:Macaca / Q000502:physiology*; D009119:Muscle Contraction; D012890:Sleep; D013045:Species Specificity