2025
Hippocampal ensembles regulate circuit-induced relapse of extinguished fear
Hassell J, Arellano Perez A, Vasudevan K, Ressler R, Garcia G, Parr M, Vierkant V, Bayer H, Maren S. Hippocampal ensembles regulate circuit-induced relapse of extinguished fear. Molecular Psychiatry 2025, 30: 4700-4709. PMID: 40413310, PMCID: PMC12436148, DOI: 10.1038/s41380-025-03064-3.Peer-Reviewed Original ResearchPost-traumatic stress disorderContextual fear memoryFear memoryExtinction learningFear conditioningConditioned stimulusExcitatory DREADDsFormation of contextual fear memoryChemogenetic reactivationRelapse of fearAuditory conditioned stimulusIntra-hippocampal infusionThalamic nucleus reuniensAuditory fear conditioningNMDA receptor antagonistExtinguished CSBehavioral therapyStress disorderNucleus reuniensHippocampal ensemblesReuniensReceptor antagonistHPC neuronsMemoryDREADDs
2024
Hippocampal Engrams and Contextual Memory
Vasudevan K, Hassell J, Maren S. Hippocampal Engrams and Contextual Memory. Advances In Neurobiology 2024, 38: 45-66. PMID: 39008010, PMCID: PMC12006847, DOI: 10.1007/978-3-031-62983-9_4.Peer-Reviewed Original ResearchConceptsContextual fear conditioningFear conditioningFear memoryRetrieval of contextual fear memoryRetrieval of aversive memoriesNeural substrates of memoryPost-traumatic stress disorderContextual fear memorySubstrate of memoryActivity-dependent taggingRetrieval of eventsAversive memoryEncoding contextStress disorderContextual stimuliNeural substratesMemory ensemblesHippocampal ensemblesNeuronal mechanismsContextual learningHippocampusMemoryFearRetrievalEncoding
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