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Cocaine Place Conditioning Strengthens Location-Specific Hippocampal Coupling to the Nucleus Accumbens

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Cocaine Place Conditioning Strengthens Location-Specific Hippocampal Coupling to the Nucleus Accumbens
Lucas Sjulson, Adrien Peyrache, Andrea Cumpelik, Daniela Cassataro, György Buzsáki
Neuron
Conditioned place preference (CPP) is a widely used model of addiction-related behavior whose underlying mechanisms are not understood. In this study, we used dual site silicon probe recordings in freely moving mice to examine interactions between the hippocampus and nucleus accumbens in cocaine CPP. We found that CPP was associated with recruitment of D2-positive nucleus accumbens medium spiny neurons to fire in the cocaine-paired location, and this recruitment was driven predominantly by selective strengthening of coupling with hippocampal place cells that encode the cocaine-paired location.

Highlights

  • Cocaine place conditioning increases subsequent firing in D2R medium spiny neurons
  • Accumbens neurons decode spatial information from hippocampal inputs
  • Increased accumbens firing is due to location-selective coupling with hippocampus
2018-06-05
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