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Sex hormones and cognitive functioning in men.

K Christiansen1, R Knussmann

  • 1Institute of Human Biology, University of Hamburg, FRG.

Neuropsychobiology
|January 1, 1987
PubMed
Summary

Higher testosterone levels in healthy young men correlate with better spatial abilities and reduced verbal skills. This study links androgen concentrations to specific cognitive functions within the normal physiological range.

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Area of Science:

  • Neuroendocrinology
  • Cognitive Neuroscience
  • Human Physiology

Background:

  • Androgens, such as testosterone, are known to influence various physiological processes.
  • The relationship between androgen levels and cognitive functions, particularly in healthy young men, requires further elucidation.
  • Previous research suggests potential links between hormones and cognitive performance, but specific correlations need detailed investigation.

Purpose of the Study:

  • To investigate the correlation between serum concentrations of testosterone (Tser) and 5 alpha-dihydrotestosterone (DHT), and salivary free testosterone (Tsal) and cognitive abilities in healthy young men.
  • To determine if androgen levels within the normal physiological range are associated with specific cognitive functions, including spatial and verbal abilities.
  • To analyze the relationship between androgens and intra-individual variance in cognitive task performance.

Main Methods:

  • Collection of blood and saliva samples from 117 healthy young men.
  • Radioimmunoassays used to quantify serum testosterone (Tser), serum 5 alpha-dihydrotestosterone (DHT), and salivary free testosterone (Tsal).
  • Assessment of cognitive functioning using five spatial and six verbal ipsative tests to measure intra-individual performance variance.

Main Results:

  • A significant positive correlation was observed between serum testosterone (Tser) levels and measures of spatial ability and field dependence-independence.
  • Serum 5 alpha-dihydrotestosterone (DHT) and salivary free testosterone (Tsal) also showed a significant positive correlation with spatial abilities, though to a lesser extent than Tser.
  • A significant negative correlation was found between androgen levels (Tser, DHT, Tsal) and measures of verbal production.

Conclusions:

  • Within the normal physiological range, higher androgen levels, particularly testosterone, are associated with enhanced spatial cognitive abilities in young men.
  • Conversely, elevated androgen levels correlate with reduced verbal production capabilities.
  • These findings suggest a hormonal influence of androgens on distinct cognitive domains, specifically favoring spatial processing over verbal tasks in healthy young males.

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