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Parallel ventral hippocampus-lateral septum pathways differentially regulate approach-avoidance conflict
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Parallel ventral hippocampus-lateral septum pathways differentially regulate approach-avoidance conflict
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Journal Article
Parallel ventral hippocampus-lateral septum pathways differentially regulate approach-avoidance conflict
2022
Overview
The ability to resolve an approach-avoidance conflict is critical to adaptive behavior. The ventral CA3 (vCA3) and CA1 (vCA1) subfields of the ventral hippocampus (vHPC) have been shown to facilitate avoidance and approach behavior, respectively, in the face of motivational conflict, but the neural circuits by which this subfield-specific regulation is implemented is unknown. We demonstrate that two distinct pathways from these subfields to lateral septum (LS) contribute to this divergent control. In Long-Evans rats, chemogenetic inhibition of the vCA3- LS caudodorsal (cd) pathway potentiated approach towards a learned conflict-eliciting stimulus, while inhibition of the vCA1-LS rostroventral (rv) pathway potentiated approach non-specifically. Additionally, vCA3-LScd inhibited animals were less hesitant to explore food during environmental uncertainty, while the vCA1- LSrv inhibited animals took longer to initiate food exploration. These findings suggest that the vHPC influences multiple behavioral systems via differential projections to the LS, which in turn send inhibitory projections to motivational centres of the brain.
The ventral hippocampal CA3 and CA1 subfields play a critical role in the resolution of approach-avoidance conflict. Here the authors show that the subfields contribute to the regulation of this behavior through topographically distinct projections to the lateral septum.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 64/86
/ 82/51
/ Animals
/ Behavior
/ Food
/ Humanities and Social Sciences
/ Neural Pathways - physiology
/ Rats
/ Science
/ Septum
