title: Mental retadation: a MRI study of 146 Brazilian children.
abstract: We report results of a magnetic ressonance imaging (MRI) study of 146 Brazilian children, whose intelligence quotient scored less than 70. 50% of MRI examinations did not exhibit any signal of structural lesion (N group), whereas a focal thinning at the junction of the body and splenium of the corpus callosum; ventricular asymmetry; periventricular leukomalacia; gliosis and arachnoid cysts were among the most frequent findings in the remaining of subjects (L group). Maternal stress and altered blood pressure were the most frequent findings in the pre-natal history of both N and L children. Familial antecedents of mental deficiency were reported in 30% of both groups, whereas familiar history of alcoholism was important in N group (60% in N versus 0% in L groups). Neuropsychomotor development was delayed in 80% of the children in both groups. Aggressiveness is the most frequent finding in the post-natal children history.
authors.affiliation: Department of Radiology, School of Medicine, University of São Paulo, Brazil.
authors.forename: Armando Freitas
authors.initials: AF
authors.lastname: da Rocha
authors.forename: Cláudia
authors.initials: C
authors.lastname: da Costa Leite
authors.forename: Fábio Theoto
authors.initials: FT
authors.lastname: Rocha
authors.forename: Eduardo
authors.initials: E
authors.lastname: Massad
authors.forename: Giovanni Guido
authors.initials: GG
authors.lastname: Cerri
authors.forename: Sueli Aparecida
authors.initials: SA
authors.lastname: de Oliveira Angelotti
authors.forename: Eloisa Helena Garcia
authors.initials: EH
authors.lastname: Gomes
authors.forename: Carla Cristina M
authors.initials: CC
authors.lastname: Oliveira
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000002:abnormalities*; D002648:Child; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000209:etiology / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D011247:Pregnancy; D011248:Pregnancy Complications / Q000523:psychology