2023
Neural valuation of rewards and punishments in posttraumatic stress disorder: a computational approach
Jia R, Ruderman L, Pietrzak R, Gordon C, Ehrlich D, Horvath M, Mirchandani S, DeFontes C, Southwick S, Krystal J, Harpaz-Rotem I, Levy I. Neural valuation of rewards and punishments in posttraumatic stress disorder: a computational approach. Translational Psychiatry 2023, 13: 101. PMID: 36977676, PMCID: PMC10050320, DOI: 10.1038/s41398-023-02388-4.Peer-Reviewed Original ResearchConceptsPosttraumatic stress disorderValuation systemStress disorderCombat veteransMaintenance of PTSDSubjective valueBrain valuation systemNeural valuation systemVentromedial prefrontal cortexFunctional MRI studyFunction of symptomsMale combat veteransNeural valuationSeries of choicesFear learningPunishment processingPosttrauma symptomsPTSD symptomsNeural encodingNeural mechanismsUncertain optionsPrefrontal cortexSubjective valuationVentral striatumMonetary gains
2019
Neural computations of threat in the aftermath of combat trauma
Homan P, Levy I, Feltham E, Gordon C, Hu J, Li J, Pietrzak RH, Southwick S, Krystal JH, Harpaz-Rotem I, Schiller D. Neural computations of threat in the aftermath of combat trauma. Nature Neuroscience 2019, 22: 470-476. PMID: 30664770, PMCID: PMC6829910, DOI: 10.1038/s41593-018-0315-x.Peer-Reviewed Original ResearchConceptsPTSD symptomsPost-traumatic stress disorder symptomsHigher PTSD symptom severityThreat-predictive cuesPTSD symptom severityAssociative threatPredictive cuesNeural trackingDisorder symptomsPrediction errorCombat veteransDynamic learning rateNegative outcomesCombat traumaSmaller amygdala volumesNeural computationLatent markersSymptomatic veteransSymptom severityAmygdala volumeAssociabilityCuesLearning rateVeteransSymptoms
2013
Ketamine Effects on Memory Reconsolidation Favor a Learning Model of Delusions
Corlett PR, Cambridge V, Gardner JM, Piggot JS, Turner DC, Everitt JC, Arana FS, Morgan HL, Milton AL, Lee JL, Aitken MR, Dickinson A, Everitt BJ, Absalom AR, Adapa R, Subramanian N, Taylor JR, Krystal JH, Fletcher PC. Ketamine Effects on Memory Reconsolidation Favor a Learning Model of Delusions. PLOS ONE 2013, 8: e65088. PMID: 23776445, PMCID: PMC3680467, DOI: 10.1371/journal.pone.0065088.Peer-Reviewed Original ResearchConceptsMemory strengthMemory reconsolidationIndividual brain responsesError-dependent learningPsychotogenic effectsSubsequent memoryFear memoryBizarre beliefsBrain responsesDelusional beliefsPrediction errorImpact of ketamineIndividual vulnerabilityBrain signalsSubject studyReconsolidationIndependent samplesLearning procedureMemoryKetamine effectsDelusionsBeliefsPlacebo administrationPsychosisNMDA receptor antagonist
2008
A Meta-Analysis of D-Cycloserine and the Facilitation of Fear Extinction and Exposure Therapy
Norberg MM, Krystal JH, Tolin DF. A Meta-Analysis of D-Cycloserine and the Facilitation of Fear Extinction and Exposure Therapy. Biological Psychiatry 2008, 63: 1118-1126. PMID: 18313643, DOI: 10.1016/j.biopsych.2008.01.012.Peer-Reviewed Original ResearchConceptsExposure therapyFear extinctionD-cycloserineNMDA receptor functionPartial N-methyl-d-aspartate (NMDA) receptor agonistEffects of DCSExposure-based therapyExposure-based treatmentsFear memory consolidationReceptor functionN-methyl-D-aspartate receptor agonistMemory consolidationDCS doseTranslational researchExposure procedureTherapy literatureEnglish-language journal articlesReceptor agonistQuantitative reviewTrial designMeta-AnalysisTherapyStudy authorsTypes of subjectsEffective agent
1996
Neural Mechanisms in dissociative amnesia for childhood abuse: relevance to the current controversy surrounding the "false memory syndrome"
Bremner JD, Krystal JH, Charney DS, Southwick SM. Neural Mechanisms in dissociative amnesia for childhood abuse: relevance to the current controversy surrounding the "false memory syndrome". American Journal Of Psychiatry 1996, 153: 71-82. PMID: 8659644, DOI: 10.1176/ajp.153.7.71.Peer-Reviewed Original ResearchConceptsFalse memory syndromeMemory tracesChildhood abuseDissociative amnesiaEffects of stressMemory functionMemory syndromeNeurobiology of memoryBrain regionsNormal memory functionChildren's memoryTraumatic stressorsSpecific brain regionsNeural mechanismsStressful eventsMemoryAmnesiaExtreme stressBrain chemistryAbuseRecallPsychiatric disordersLong-term alterationsLong-term effectsNormal persons
1995
Functional neuroanatomical correlates of the effects of stress on memory
Bremner J, Krystal J, Southwick S, Charney D. Functional neuroanatomical correlates of the effects of stress on memory. Journal Of Traumatic Stress 1995, 8: 527-553. PMID: 8564272, DOI: 10.1002/jts.2490080403.Peer-Reviewed Original ResearchConceptsPosttraumatic stress disorderEffects of stressBrain regionsTraumatic stressNeural mechanismsSymptoms of PTSDFalse memory syndromeFunctional neuroanatomical correlatesFear conditioningNeurobiological approachStress disorderDissociative amnesiaMemory syndromeStress sensitizationNeuroanatomical correlatesMemory functionChildhood memoriesMemoryStress-induced alterationsImplicationsAmnesiaPsychotherapyCorrelatesConditioningSymptomsEffects of tryptophan depletion on responses to yohimbine in healthy human subjects
Goddard A, Charney D, Germine M, Woods S, Heninger G, Krystal J, Goodman W, Price L. Effects of tryptophan depletion on responses to yohimbine in healthy human subjects. Biological Psychiatry 1995, 38: 74-85. PMID: 7578653, DOI: 10.1016/0006-3223(94)00223-p.Peer-Reviewed Original ResearchConceptsHealthy human subjectsTryptophan depletionAlpha-2 adrenergic antagonist yohimbinePlacebo-controlled challenge testHuman subjectsAntagonist yohimbineNeurotransmitter systemsSerotonin systemChallenge testPossible functional interactionBiochemical variablesWhole groupFeelings of nervousnessNE functionMarked increaseNorepinephrineConsiderable evidenceFear responsesSubjectsHuman anxietyNervousnessCombination testControl testsFunctional interactionUnique changes
1990
Serotonin Function and Human Anxiety Disordersa
CHARNEY D, WOODS S, KRYSTAL J, HENINGER G. Serotonin Function and Human Anxiety Disordersa. Annals Of The New York Academy Of Sciences 1990, 600: 558-572. PMID: 2252335, DOI: 10.1111/j.1749-6632.1990.tb16910.x.Peer-Reviewed Original ResearchMarijuana (cannabis) use is anecdotally said to precipitate anxiety symptoms in patients with panic disorder. Is there any research evidence to support this? Also, can marijuana use precipitate or expose paranoia in patients with an underlying bipolar disorder?
SEIBYL J, KRYSTAL J, CHARNEY D. Marijuana (cannabis) use is anecdotally said to precipitate anxiety symptoms in patients with panic disorder. Is there any research evidence to support this? Also, can marijuana use precipitate or expose paranoia in patients with an underlying bipolar disorder? Journal Of Clinical Psychopharmacology 1990, 10: 78. PMID: 2307743, DOI: 10.1097/00004714-199002000-00033.Peer-Reviewed Original Research
1989
Clinical and Medication Outcome After Short-term Alprazolam and Behavorial Group Treatment in Panic Disorder: 2.5-Year Naturalistic Follow-up Study
Nagy LM, Krystal JH, Woods SW, Charney DS. Clinical and Medication Outcome After Short-term Alprazolam and Behavorial Group Treatment in Panic Disorder: 2.5-Year Naturalistic Follow-up Study. JAMA Psychiatry 1989, 46: 993-999. PMID: 2818144, DOI: 10.1001/archpsyc.1989.01810110035005.Peer-Reviewed Original ResearchConceptsFU periodAlprazolam treatmentMajor depressionPanic disorderPanic attacksPanic attack frequencyBehavioral group treatment programGreater symptom severityAntipanic effectsNonpharmacologic therapiesMedication outcomesNaturalistic followGroup treatment programAlprazolam dosesSame doseLow doseLifetime diagnosisAttack frequencySymptom severityTreatment programBehavioral therapyPatientsAdmissionAlprazolamTreatment gains
1988
YOHIMBINE ALTERS REGIONAL CEREBRAL BLOOD FLOW IN PANIC DISORDER
Woods SW, Koster K, Krystal JK, Smith EO, Zubal IG, Hoffer PB, Charney DS. YOHIMBINE ALTERS REGIONAL CEREBRAL BLOOD FLOW IN PANIC DISORDER. The Lancet 1988, 332: 678. PMID: 2901529, DOI: 10.1016/s0140-6736(88)90484-9.Peer-Reviewed Original Research
1984
Multiple Mechanisms of withdrawal from Opioid Drugs
Redmond DE, Krystal JH. Multiple Mechanisms of withdrawal from Opioid Drugs. Annual Review Of Neuroscience 1984, 7: 443-478. PMID: 6324646, DOI: 10.1146/annurev.ne.07.030184.002303.Peer-Reviewed Original ResearchAcetylcholineAdenine NucleotidesAnimalsBenzodiazepinesCalciumCalmodulinClonidineConditioning, PsychologicalCyclic GMPDopamineDrug ToleranceEnkephalinsFearGamma-Aminobutyric AcidHumansMethadoneNaloxoneNarcotic AntagonistsNarcoticsNeuronsNorepinephrineProtein ConformationReceptors, OpioidSerotoninSubstance Withdrawal Syndrome