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4 - Behavioural correlates of testosterone

Published online by Cambridge University Press:  18 January 2010

E. Nieschlag
Affiliation:
Westfälische Wilhelms-Universität Münster, Germany
H. M. Behre
Affiliation:
Westfälische Wilhelms-Universität Münster, Germany
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Summary

Introduction

Behavioural endocrinology is the study of the interaction between hormones and behaviour. This interaction is bidirectional: hormones can affect behaviour, and behaviour can alter hormone levels. Thus, hormonal-behavioural correlations can be due to hormonal effects on behaviour, but certain behaviour (such as physical exercise, stress, sexual behaviour, alcohol consumption, and nutrition) is known to influence hormone levels as well (see below and Christiansen 1999).

Hormones do not cause behavioural changes per se; they can only alter the probability that particular behaviour will occur in the presence of a particular stimulus. Hormones can influence regions of the central nervous system (CNS) which contain hormone receptors by inducing changes in the rate of cellular function. The interaction of a hormone with its receptor begins a series of cellular events that lead to a genomic response wherein the hormone acts directly or indirectly to activate genes that regulate protein synthesis (e.g., Bixo et al. 1995; Chalepakis et al. 1990; Ford and Cramer 1982; Genazzani et al. 1992; Hutchinson 1991; McEwen 1992; McEwen et al. 1984; Sekeris 1990; Viru 1991).

Two decisive phases have been named in the discussion about the time of the effects of sex hormones on brain structures and consequently on behaviour. During fetal and neonatal life, relatively high concentrations of hormones, especially testosterone, are said to influence brain development by organizing the undifferentiated brain in a sex-specific manner.

Type
Chapter
Information
Testosterone
Action, Deficiency, Substitution
, pp. 125 - 172
Publisher: Cambridge University Press
Print publication year: 2004

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