title: [Sexual differences in functional hemispheric asymmetry: verbal tachistoscopic evaluation using microcomputers].
abstract: Study of sexual differences for the hemispheric prevalence on visual verbal stimuli using a microcomputer-based tachistoscope technic. Seventeen right-handed individuals, 10 males and 7 females (mean age 32 years old), without neurological or visual abnormalities were studied. The subjects performed a verbal trigram tachistoscope test, using a IBM PC microcomputer compatible. The trigram consists of 80 consonant-vowel-consonant pairs of stimuli presented randomly to right and left visual fields. The evaluation was made through two conditions: T1 and T2. In T1 Experiment stimuli exposition time was 260 ms, and in T2 Experiment the stimuli exposition time was 160 ms. In T1 Experiment 80% of females showed a Right Hemispherical Preference while 100% of males showed a Left Hemispherical Preference. In T2 Experiment, both sexes showed Left Hemispheric Preference. A close relationship between sexual difference and hemispheric preference was found. We point out the importance of stimuli exposition time in determination of sexual differences in lateral hemispherical asymmetry.
authors.affiliation: Disciplina de Neurologia, Escola Paulista de Medicina, São Paulo, Brasil.
authors.forename: M
authors.initials: M
authors.lastname: Muszkat
authors.forename: L
authors.initials: L
authors.lastname: Frayman
authors.forename: N S
authors.initials: NS
authors.lastname: De Vincenzo
authors.forename: C J
authors.initials: CJ
authors.lastname: De Campos
mesh_terms: D000328:Adult; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D008838:Microcomputers; D010775:Photic Stimulation; D012727:Sex Characteristics; D014705:Verbal Behavior / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*
vernacular_title: Diferenças sexuais na assimetria funcional hemisférica. Avaliação taquistoscópica verbal utilizando microcomputador.