title: Relations between a dermatoglyphic measure, hemispheric specialization, and intellectual abilities in 47,XXY males.
abstract: Verbal IQ is usually lower than performance IQ in neonatally identified 47,XXY males. A dermatoglyphic measure reflecting prenatal growth rates and indices of sex-related hormonal functioning are also frequently abnormal in 47,XXY males. This paper presents evidence indicating that a measure of prenatal growth rate predicts right hemispheric specialization for nonverbal processing in extra X males, whereas levels of testosterone, estradiol, luteinizing hormone, and follicle-stimulating hormones do not. Findings are also reported which indicate that the low verbal IQs of 47,XXY males are the result of abnormalities in right hemispheric functioning.
mesh_terms: D002648:Child; D003878:Dermatoglyphics; D004292:Dominance, Cerebral / Q000502:physiology; D005111:Extrachromosomal Inheritance; D012739:Gonadal Steroid Hormones / Q000097:blood; D006801:Humans; D007360:Intelligence; D007621:Karyotyping; D008297:Male; D009483:Neuropsychological Tests; D012729:Sex Chromosome Aberrations / Q000235:genetics*; D014960:X Chromosome
chemical_list: D012739:Gonadal Steroid Hormones