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Related Experiment Videos

Avian telencephalon and body weight

P R Sanberg1, T W Johnson, D W Cahill

  • 1Department of Surgery, University of South Florida, College of Medicine, Tampa 33612.

Physiology & Behavior
|June 1, 1994
PubMed
Summary

Investigating avian body weight regulation, this study found that paleostriatum lesions in chicks significantly decreased body weight. This suggests basal ganglia involvement in weight control, similar to mammals.

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Area of Science:

  • Neuroscience
  • Comparative Physiology
  • Animal Behavior

Background:

  • Mammalian studies extensively explore neurological weight gain mechanisms.
  • Avian research on weight regulation is less developed, though hypothalamic control is similar to mammals.
  • The basal ganglia's role in mammalian weight regulation prompts investigation in birds.

Purpose of the Study:

  • To investigate the role of the basal ganglia, specifically the paleostriatum, in avian body weight regulation.
  • To analyze manipulative studies in chickens to determine if basal ganglia structures influence weight control.
  • To compare avian basal ganglia function in weight regulation with known mammalian mechanisms.

Main Methods:

  • Intracerebral injections of cycloheximide, glutamate, or saline into 1-day-old chicks.
  • Surgical ablation of the neocortex or kainic acid-induced lesions of the paleostriatum in 3-day-old chicks.
  • Analysis of body weight data following these interventions.

Main Results:

  • Injections of cycloheximide or glutamate, and kainic acid lesions, led to decreased body weight in chicks.
  • Paleostriatal lesions induced by kainic acid resulted in a significant long-term decrease in body weight.
  • Lesions in the neostriatum or hyperstriatum did not affect weight gain compared to controls.

Conclusions:

  • The avian paleostriatum, part of the basal ganglia, appears to play a role in regulating body weight.
  • Neurological mechanisms controlling body weight in birds may share similarities with those in mammals, particularly involving the basal ganglia.
  • Further research into the basal ganglia's function in avian weight regulation is warranted.

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