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Energy allocation between brain and body during ontogenetic development.

Britta Kubera1, Anja Bosy-Westphal, Achim Peters

  • 1Medical Clinic 1, University of Luebeck, Ratzeburger Allee 160, 23538, Luebeck, Germany.

American Journal of Human Biology : the Official Journal of the Human Biology Council
|September 17, 2013
PubMed
Summary
This summary is machine-generated.

Energy allocation shifts between brain and body during development and weight loss. Brain energy share decreases with age but increases during weight loss, influenced by insulin levels.

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Area of Science:

  • Human physiology
  • Developmental biology
  • Metabolic research

Background:

  • Energy allocation between brain and body is crucial for development and metabolic health.
  • Understanding these shifts can provide insights into growth and weight management.

Purpose of the Study:

  • To investigate how energy is allocated between the brain and body during human ontogenetic development (childhood to adulthood).
  • To examine energy allocation changes during weight loss.
  • To explore the role of plasma insulin in these energy allocation shifts.

Main Methods:

  • Studied 180 children/adolescents and 52/42 adult women (normal weight/obese).
  • Assessed brain mass via MRI, body metabolism via indirect calorimetry, and plasma insulin levels.
  • Calculated 'encephalic measure' using a brain-body-plot relative to a reference mammal.

Main Results:

  • Ontogenetic development showed decreasing encephalic measures in females and increasing plasma insulin in both sexes.
  • Weight loss (approx. 5kg female, 9kg male) led to reduced insulin and increased encephalic measures.
  • Higher encephalic measures indicate greater energy allocation to the brain.

Conclusions:

  • Brain energy allocation decreases during development but increases with weight loss.
  • Plasma insulin concentrations appear to drive these developmental and weight-loss-related energy allocation changes.