Sex differences in lateral facial facility: the effects of habitual emotional concealment.
Right-handed subjects attempted five different lateral facial actions: winking, eyebrow raising, mouth corner raising, nose wrinkling and mouth corner lowering. Males exhibited significantly greater left side facial facility than did females. The findings lend support to the suggestion that there is a neuroanatomical sex difference in the control of facial expression. For females only, the findings also support the suggestion that the habitual hiding of one's emotions produces greater lateral facial facility.
D000293:Adolescent; D000328:Adult; D004644:Emotions; D005145:Face / Q000502:physiology; D005149:Facial Expression; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008875:Middle Aged; D012737:Sex Factors