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
Pharmacological stimulation of infralimbic cortex after fear conditioning facilitates subsequent fear extinction
Bayer H, Hassell J, Oleksiak C, Garcia G, Vaughan H, Juliano V, Maren S. Pharmacological stimulation of infralimbic cortex after fear conditioning facilitates subsequent fear extinction. Neuropsychopharmacology 2024, 49: 1951-1957. PMID: 39138373, PMCID: PMC11480363, DOI: 10.1038/s41386-024-01961-9.Peer-Reviewed Original ResearchMedial prefrontal cortexFear conditioningConditioned freezingConditioned stimulusExtinction of conditioned fear memoryConsolidation of fear conditioningExtinction of conditioned fearAuditory conditioned stimulusConditioned fear memoryGABAA receptor antagonistExtinction trainingExtinction learningPicrotoxin infusionConditioned fearFear extinctionInfralimbic cortexPrefrontal cortexFear suppressionInhibitory memoryFear memoryExtinction retrievalPicrotoxin injectionNeuronal plasticityFemale ratsReceptor antagonist
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