title: Crying and laughing in imbeciles.
mesh_terms: D000367:Age Factors; D002648:Child; D002673:Child, Hospitalized; D002675:Child, Preschool; D003448:Crying; D004314:Down Syndrome; D005260:Female; D006801:Humans; D008607:Intellectual Disability; D007804:Language Development; D007845:Laughter; D008297:Male; D009043:Motor Activity; D012737:Sex Factors