title: The mandibular symphysis in mental defect--support for a genetic link.
mesh_terms: D000293:Adolescent; D000328:Adult; D001925:Brain Damage, Chronic; D002508:Cephalometry; D004777:Environment; D005824:Genetics, Behavioral; D006801:Humans; D008607:Intellectual Disability; D007360:Intelligence; D007621:Karyotyping; D008297:Male; D008334:Mandible / Q000033:anatomy & histology*; D008875:Middle Aged