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Related Experiment Videos

Puberty-related influences on brain development.

Jay N Giedd1, Liv S Clasen, Rhoshel Lenroot

  • 1Child Psychiatry Branch, National Institute of Mental Health, Building 10, Room 4C110, 10 Center Drive, MSC 1367, Bethesda, MD 20892, United States. jg@nih.gov

Molecular and Cellular Endocrinology
|June 13, 2006
PubMed
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Puberty impacts brain development, influencing cognition and behavior. Neuroimaging reveals sex differences in brain maturation and how hormonal/chromosomal variations affect brain structure and associated learning difficulties.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Endocrinology

Background:

  • Puberty significantly alters cognition and behavior.
  • Understanding neuroanatomical changes during puberty is crucial for explaining behavioral shifts.
  • Hormonal and sex chromosome variations can influence brain development.

Purpose of the Study:

  • To review and synthesize neuroimaging data to indirectly assess puberty's effects on neuroanatomy.
  • To compare brain morphometry trajectories between typically developing individuals and those with hormonal/chromosomal anomalies.
  • To correlate neuroanatomical findings with observed behavioral and cognitive changes.

Main Methods:

  • Systematic review and synthesis of existing neuroimaging studies.
  • Analysis of brain morphometry data (e.g., gray matter thickness, volume) across different age groups and sexes.

Related Experiment Videos

  • Inclusion of data from typically developing children/adolescents and those with congenital adrenal hyperplasia (CAH) or XXY karyotype.

    • Main Results:

    • Girls generally reach peak gray matter thickness 1-2 years earlier than boys.
    • Congenital adrenal hyperplasia (CAH) is associated with smaller amygdala volume in both sexes.
    • XXY subjects exhibit gray matter reductions in brain regions linked to language processing.

    Conclusions:

    • Brain morphometry trajectories during puberty show significant sex differences.
    • Hormonal variations like elevated prenatal testosterone (CAH) impact specific brain structures (amygdala).
    • Sex chromosome variations (XXY) are linked to neuroanatomical differences correlating with learning difficulties.