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Two Different Real-Time Place Preference Paradigms Using Optogenetics within the Ventral Tegmental Area of the Mouse
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Ventral pallidal modulation of aversion processing.

Andreas B Wulff1, Jessica Tooley2, Lauren J Marconi1

  • 1University of Maryland School of Medicine, Department of Pharmacology, United States.

Brain Research
|October 10, 2018
PubMed
Summary
This summary is machine-generated.

Glutamatergic ventral pallidum (VP) neurons are crucial for processing aversion, while GABAergic VP neurons support reward processing. Ablating glutamatergic VP neurons impairs reward devaluation, highlighting distinct roles in survival behaviors.

Keywords:
DopamineElectrophysiologyGABAGlutamateHabenulaVentral tegmental area

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Area of Science:

  • Neuroscience
  • Behavioral Neuroscience
  • Molecular Psychiatry

Background:

  • The ventral pallidum (VP) is a key component of the mesolimbic network, integrating signals from the nucleus accumbens and projecting to the lateral habenula (LHb) and ventral tegmental area (VTA).
  • The VP's strategic position suggests a role in modulating reward and aversion processing, essential for survival.
  • Neurochemically distinct subpopulations within the VP may differentially contribute to these functions.

Purpose of the Study:

  • To investigate the specific roles of distinct VP neuronal subpopulations in processing aversive stimuli.
  • To elucidate the contribution of VP circuitry to adaptive behaviors in response to rewards and aversions.
  • To integrate findings from human imaging, rodent models, and optogenetics to understand VP function.

Main Methods:

  • Human functional neuroimaging.
  • Rodent behavioral pharmacology.
  • Optogenetic circuit dissection in rodents.
  • Genetic ablation of specific VP neuronal populations.

Main Results:

  • Glutamatergic VP neurons uniquely contribute to aversion processing.
  • GABAergic VP neurons are involved in reinforcement and encoding reward value.
  • Genetic ablation of glutamatergic VP neurons abolished the devaluation of natural rewards paired with an aversive stimulus.
  • Both glutamatergic and GABAergic VP populations modulate LHb and VTA activity, essential for adaptive behaviors.

Conclusions:

  • VP subpopulations play distinct, critical roles in processing aversive and rewarding stimuli.
  • Understanding these distinct roles is vital for developing targeted therapies for reward-related disorders.
  • Future research should explore neuromodulatory influences and alterations in disease models.