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Related Experiment Videos

Neonatal thermal lesions of the mesolimbocortical dopaminergic projection decrease food-hoarding behavior.

A Kalsbeek1, J P De Bruin, M G Feenstra

  • 1Netherlands Institute for Brain Research, Amsterdam.

Brain Research
|December 13, 1988
PubMed
Summary

Neonatal dopamine depletion in the prefrontal cortex significantly impairs food hoarding in rats. This suggests the dopaminergic projection is crucial for this behavior, contrary to previous findings.

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Area of Science:

  • Neuroscience
  • Behavioral Neuroscience
  • Developmental Neuroscience

Background:

  • The dopaminergic mesocortical projection plays a role in prefrontal cortex (PFC)-mediated behaviors.
  • Neonatal alterations in this pathway may impact adult behavioral development.

Purpose of the Study:

  • To investigate the impact of neonatal dopaminergic A10 cell group depletion on food-hoarding behavior in adult rats.
  • To determine the relationship between dopamine levels in the medial PFC and food-hoarding activity.

Main Methods:

  • Neonatal thermal lesions were applied to the dopaminergic A10 cell group in the ventral tegmental area of male and female rats.
  • Adult rats were assessed in a food-hoarding task.
  • Biochemical analysis measured dopamine, serotonin, and noradrenaline levels in the PFC.

Related Experiment Videos

  • Correlational analysis examined the relationship between neurotransmitter levels and hoarding scores.

    • Main Results:

    • Neonatal dopamine depletion in the PFC significantly reduced food-hoarding behavior.
    • A positive correlation was found between medial PFC dopamine content and hoarding scores.
    • Serotonin levels in the PFC were also reduced, but not correlated with hoarding.
    • Noradrenaline levels remained unchanged.

    Conclusions:

    • The integrity of the dopaminergic projection to the PFC is essential for normal food-hoarding behavior.
    • Neonatal dopamine depletion in the PFC does not spare food-hoarding activity, challenging previous research.
    • Dopamine, not serotonin, is the key neurotransmitter in the PFC for regulating food hoarding in this model.