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Related Concept Videos

Role of Hippocampus in Memory01:19

Role of Hippocampus in Memory

244
The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
244

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Ventral hippocampus mediates inter-trial responding in signaled active avoidance.

Cecily R Oleksiak1,2, Samantha L Plas1,2, Denise Carriaga3

  • 1Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX 77845.

Biorxiv : the Preprint Server for Biology
|April 2, 2024
PubMed
Summary

The ventral hippocampus (VH) regulates context-dependent intertrial responses (ITRs) during signaled active avoidance (SAA). VH inactivation reduced ITRs, while activation increased them, suggesting a key role in these avoidance behaviors.

Keywords:
AvoidanceContextDREADDsInter-trial IntervalsVentral hippocampus

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Area of Science:

  • Neuroscience
  • Behavioral Neuroscience
  • Memory Research

Background:

  • The hippocampus is crucial for contextual memory.
  • Previous research indicated ventral hippocampus (VH) inactivation affects context-dependence in signaled active avoidance (SAA).
  • Intertrial responses (ITRs) are unreinforced avoidance behaviors occurring between SAA trials.

Conclusions:

  • The ventral hippocampus (VH) plays a significant role in mediating context-dependent intertrial responses (ITRs) during signaled active avoidance (SAA).
  • ITRs are not solely dependent on context-US associations.
  • These findings offer insights into the neural mechanisms underlying avoidance behaviors relevant to human anxiety disorders.