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Table of Contents
Vol. 27, No. 2, 1993
Issue release date: 1993
Section title: Biological Psychology/Pharmacopsychology
Neuropsychobiology 1993;27:97–107
(DOI:10.1159/000118961)

Sex Hormone-Related Variations of Cognitive Performance in !Kung San Hunter-Gatherers of Namibia

Christiansen K.
Institute of Human Biology, University of Hamburg, FRG

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Article / Publication Details

First-Page Preview
Abstract of Biological Psychology/Pharmacopsychology

Published online: February 22, 2008
Issue release date: 1993

Number of Print Pages: 11
Number of Figures: 0
Number of Tables: 0

ISSN: 0302-282X (Print)
eISSN: 1423-0224 (Online)

For additional information: http://www.karger.com/NPS

Abstract

The relation of circulating sex hormones and cognitive abilities was investigated in 114 healthy !Kung San men (‘bushmen’) of Namibia/Southern Africa who lived mainly as traditional hunter-gatherers. Blood and saliva samples were analysed by use of radioimmunoassays in order to determine the serum concentrations of total testosterone (Tser), 5α-dihydrotestosterone (DHT), and estradiol (E2), as well as the level of bioavailable, non-SHBG-bound ‘free’ testosterone in the saliva. The cognitive ability was assessed with two verbal (verbal fluency) and three nonverbal tests (tactual-spatial functioning, field independence/field dependence). As to be expected from previous research on Western samples, all three androgens but not E2 are of significance to the !Kung San men’s cognitive performance. Tser exhibits a positive relation to tactual-spatial abilities and to the degree of lateralization of this task; on the other hand, Tser is negatively correlated with verbal fluency. Testosterone in the saliva is also significantly positively correlated to tactual-spatial test scores and, in addition, to field independence. DHT and the ratio DHT/Tser are positively related to verbal fluency and negatively to the degree of lateralization of tactual-spatial performance.

© 1993 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Biological Psychology/Pharmacopsychology

Published online: February 22, 2008
Issue release date: 1993

Number of Print Pages: 11
Number of Figures: 0
Number of Tables: 0

ISSN: 0302-282X (Print)
eISSN: 1423-0224 (Online)

For additional information: http://www.karger.com/NPS


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