title: Sex hormones and cognitive functioning in men.
abstract: Blood and saliva samples were obtained from 117 healthy young men, following which radioimmunoassays were used to determine the serum concentrations of testosterone (Tser), 5 alpha-dihydrotestosterone (DHT), and the level of free testosterone (Tsal) in the saliva. The cognitive functioning was determined by five spatial and six verbal ipsative test scores, reflecting intra-individual variance in the performance of these tasks, independent of the person's general level of achievement. Within the normal physiological range of androgen levels--especially Tser and to a lesser extent DHT and Tsal--showed a significantly positive correlation with measures of spatial ability and field dependence-independence and a significantly negative correlation with measures of verbal production.
authors.affiliation: Institute of Human Biology, University of Hamburg, FRG.
authors.forename: K
authors.initials: K
authors.lastname: Christiansen
authors.forename: R
authors.initials: R
authors.lastname: Knussmann
mesh_terms: D000328:Adult; D003071:Cognition / Q000502:physiology*; D013196:Dihydrotestosterone / Q000097:blood / Q000378:metabolism / Q000502:physiology*; D006801:Humans; D008297:Male; D012463:Saliva / Q000032:analysis; D012727:Sex Characteristics; D013739:Testosterone / Q000097:blood / Q000378:metabolism / Q000502:physiology*; D014706:Verbal Learning
chemical_list: D013196:Dihydrotestosterone; D013739:Testosterone