15 stress induced cort high heritability 058 alan

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Unformatted text preview: xt II.  Genes III.  Experience Why do individuals differ in hormones? I.  Context II.  Genes III.  Experience GeneJc influences on hormone levels SelecJve breeding: - Can produce lines of ‘high’ and ‘low’ cort responders - SelecJng on either the behavioral or the hormonal response to stress results in changes in both traits in subsequent generaJons GeneJc influences on hormone levels Alan Wilson GeneJc influences on hormone levels Alan Wilson GeneJc influences on hormone levels Siblings had similar hormone levels even when they were raised apart - Baseline cort: low- moderate heritability (0.15) - Stress- induced cort: high heritability (0.58) Alan Wilson Why do individuals differ in hormones? I.  Context II.  Genes III.  Experience Experience and hormones Day 1 Day 8 Day 28 Day 8 Day 8 Day 28 Day 1 Day 8 Day 28 ACTH CorJcosterone Day 8 Day 1 Time Time Repeated exposure to some stressors can change how they are perceived Grissom & Bhatnagar 2009 Effects of Hormones Organiza9onal Ac9va9onal Early in life Throughout life Long- term Temporary OrganizaJonal effects of hormones on the central nervous s...
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