2023
Neural patterns differentiate traumatic from sad autobiographical memories in PTSD
Perl O, Duek O, Kulkarni K, Gordon C, Krystal J, Levy I, Harpaz-Rotem I, Schiller D. Neural patterns differentiate traumatic from sad autobiographical memories in PTSD. Nature Neuroscience 2023, 26: 2226-2236. PMID: 38036701, DOI: 10.1038/s41593-023-01483-5.Peer-Reviewed Original ResearchConceptsPost-traumatic stress disorderTraumatic memoriesAutobiographical memoryNeural patternsIntersubject representational similarity analysisSimilar neural representationsRepresentational similarity analysisPosterior cingulate cortexTrauma memoriesMnemonic featuresNegative memoriesMultivoxel patternsNeural representationCognitive stateHippocampal representationsCognitive entitiesStress disorderCingulate cortexNeural activityTraumatic narrativesIndividual symptom severitySemantic representationMemory typesOwn memoryMemory511. Common and Distinct Effects of Incentives on Spatial Working Memory in Schizophrenia and Obsessive-Compulsive Disorder
Sarantopoulos C, Shin D, Schleifer C, Moujaes F, Adkinson B, Ji J, Kolabaric A, Flynn M, Santamauro N, Krystal J, Murray J, Repovs G, Martin W, Pittenger C, Anticevic A, Cho Y. 511. Common and Distinct Effects of Incentives on Spatial Working Memory in Schizophrenia and Obsessive-Compulsive Disorder. Biological Psychiatry 2023, 93: s300-s301. DOI: 10.1016/j.biopsych.2023.02.751.Peer-Reviewed Original Research
2022
Reward and loss incentives improve spatial working memory by shaping trial-by-trial posterior frontoparietal signals
Cho YT, Moujaes F, Schleifer CH, Starc M, Ji JL, Santamauro N, Adkinson B, Kolobaric A, Flynn M, Krystal JH, Murray JD, Repovs G, Anticevic A. Reward and loss incentives improve spatial working memory by shaping trial-by-trial posterior frontoparietal signals. NeuroImage 2022, 254: 119139. PMID: 35346841, PMCID: PMC9264479, DOI: 10.1016/j.neuroimage.2022.119139.Peer-Reviewed Original ResearchConceptsMemory precisionSpatial working memoryIntraparietal sulcusPrecentral sulcusWorking memoryMotivational signalsBOLD signalParietal cortexReward/lossVisual association regionsDorsolateral prefrontal cortexGoal-directed activityMemory paradigmMemory performanceMemory processesAnterior parietal cortexExecutive networkNeural changesSensory processesPrefrontal cortexLoss incentivesVentral striatumNon-human primate studiesTranslational neuroscienceMemory
2020
Transdiagnostic, Connectome-Based Prediction of Memory Constructs Across Psychiatric Disorders
Barron DS, Gao S, Dadashkarimi J, Greene AS, Spann MN, Noble S, Lake EMR, Krystal JH, Constable RT, Scheinost D. Transdiagnostic, Connectome-Based Prediction of Memory Constructs Across Psychiatric Disorders. Cerebral Cortex 2020, 31: 2523-2533. PMID: 33345271, PMCID: PMC8023861, DOI: 10.1093/cercor/bhaa371.Peer-Reviewed Original ResearchConceptsMacroscale brain networksIndividual differencesBrain networksMemory deficitsFunctional connectivityAttention deficit hyper-activity disorderTask-based functional MRI dataLong-term memoryWhole-brain functional connectivityDiagnostic groupsWhole-brain patternsDefault mode networkFunctional MRI dataHuman Connectome ProjectPsychiatric disordersMemory constructsMemory performanceTransdiagnostic sampleBrain correlatesMode networkFunctional connectomeConnectome ProjectLimbic networkHealthy participantsMemory
2019
S159. NMDA Receptor Antagonism Effects on Delayed Spatial Working Memory and Distraction in Comparison With Schizophrenia
Moujaes F, Preller K, Vollenweider F, Schleifer C, Ji J, Adkinson B, Kolobaric A, Flynn M, Fineberg S, Krystal J, Repovs G, Santamauro N, Morgan P, Savic A, Cho Y, Murray J, Anticevic A. S159. NMDA Receptor Antagonism Effects on Delayed Spatial Working Memory and Distraction in Comparison With Schizophrenia. Biological Psychiatry 2019, 85: s358. DOI: 10.1016/j.biopsych.2019.03.910.Peer-Reviewed Original Research
2018
Similar psychotic and cognitive profile between ketamine dependence with persistent psychosis and schizophrenia
Cheng WJ, Chen CH, Chen CK, Huang MC, Pietrzak RH, Krystal JH, Xu K. Similar psychotic and cognitive profile between ketamine dependence with persistent psychosis and schizophrenia. Schizophrenia Research 2018, 199: 313-318. PMID: 29510925, DOI: 10.1016/j.schres.2018.02.049.Peer-Reviewed Original ResearchConceptsSZ patientsCognitive impairmentCognitive functionSocial-emotional cognitionCogstate Brief BatteryPsychomotor processing speedTreatment-seeking patientsSpatial problemsSymptom profilesSevere symptom profileVerbal memoryCognitive profileKetamine-dependent patientsVisual learningBrief batteryProcessing speedNegative Syndrome ScaleBiology of psychosisKetamine usersCognitive dysfunctionPersistent psychosisMemorySubscale scoresKetamine abuseMinority of users
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
2012
Mild Worry Symptoms Predict Decline in Learning and Memory in Healthy Older Adults: A 2-Year Prospective Cohort Study
Pietrzak RH, Maruff P, Woodward M, Fredrickson J, Fredrickson A, Krystal JH, Southwick SM, Darby D. Mild Worry Symptoms Predict Decline in Learning and Memory in Healthy Older Adults: A 2-Year Prospective Cohort Study. American Journal Of Geriatric Psychiatry 2012, 20: 266-275. PMID: 22354117, PMCID: PMC3285262, DOI: 10.1097/jgp.0b013e3182107e24.Peer-Reviewed Original ResearchConceptsWorry symptomsOlder adultsCommunity-dwelling older adultsCognitive functionAge-related cognitive changesHealthy Older AdultsImportance of anxietyEarly cognitive declineDepressive symptomsAssociate learningCognitive agingVisual learningCognitive changesProspective cohort studyCognitive declineDepression symptomsEarly dementiaCohort studyObservational prospective cohort studyMemoryMild levelsLearningWorryAdultsTheoretical model
2010
Toward a neurobiology of delusions
Corlett PR, Taylor JR, Wang X, Fletcher PC, Krystal JH. Toward a neurobiology of delusions. Progress In Neurobiology 2010, 92: 345-369. PMID: 20558235, PMCID: PMC3676875, DOI: 10.1016/j.pneurobio.2010.06.007.Peer-Reviewed Original ResearchConceptsFundamental brain mechanismsFronto-striatal circuitsTerms of cognitionPsychological processesBrain mechanismsComputational mechanismsCortical hierarchyPrediction errorSocial learningParietal cortexExternal worldBrain circuitsNeurobiological abnormalitiesNeurobiology of delusionsBrain functionHierarchical predictionBodily agencyDelusionsMemoryReinforcement learningPerceptionMental illnessTranslational understandingLearningCognitionSex-related differences in amygdala activity influences immediate memory
Aikins DE, Anticevic A, Kiehl KA, Krystal JH. Sex-related differences in amygdala activity influences immediate memory. Neuroreport 2010, 21: 273-276. PMID: 20093991, DOI: 10.1097/wnr.0b013e328335b3f9.Peer-Reviewed Original ResearchMeSH KeywordsAdultAmygdalaEmotionsFemaleFunctional LateralityHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMaleMemory, Short-TermMiddle AgedNeuropsychological TestsPattern Recognition, VisualPhotic StimulationPsychomotor PerformanceRecognition, PsychologyRegression AnalysisSex CharacteristicsSex FactorsConceptsAmygdala activationImmediate memoryUnpleasant picturesImmediate recognition memoryRecognition memory testRight amygdala activationLong-term memoryFunctional magnetic resonanceUnpleasant picture viewingEmotional picturesRecognition memoryMemory testAmygdala responsePicture viewingMemoryFalse positive error rateSex differencesSex-related differencesAmygdalaError ratePictureViewingLearningMagnetic resonanceDifferences
2009
Illusions and Delusions: Relating Experimentally-Induced False Memories to Anomalous Experiences and Ideas
Corlett PR, Simons JS, Pigott JS, Gardner JM, Murray GK, Krystal JH, Fletcher PC. Illusions and Delusions: Relating Experimentally-Induced False Memories to Anomalous Experiences and Ideas. Frontiers In Behavioral Neuroscience 2009, 3: 53. PMID: 19956402, PMCID: PMC2786301, DOI: 10.3389/neuro.08.053.2009.Peer-Reviewed Original ResearchSalience hypothesisMemory illusionsCognitive underpinningsDeese-RoedigerFalse memoriesPrevious stimuliAnomalous experiencesSalience modelMagical thinkingBelief formationIllusionStimuliUnpredictable experienceTheoretical importanceMemoryPerceptionExperiencePsychosisCognitionFluencySalienceAttributionHypothesisMcDermottFamiliarityWhy Do Delusions Persist?
Corlett PR, Krystal JH, Taylor JR, Fletcher PC. Why Do Delusions Persist? Frontiers In Human Neuroscience 2009, 3: 12. PMID: 19636384, PMCID: PMC2713737, DOI: 10.3389/neuro.09.012.2009.Peer-Reviewed Original Research
2008
Impairment of Working Memory Maintenance and Response in Schizophrenia: Functional Magnetic Resonance Imaging Evidence
Driesen NR, Leung HC, Calhoun VD, Constable RT, Gueorguieva R, Hoffman R, Skudlarski P, Goldman-Rakic PS, Krystal JH. Impairment of Working Memory Maintenance and Response in Schizophrenia: Functional Magnetic Resonance Imaging Evidence. Biological Psychiatry 2008, 64: 1026-1034. PMID: 18823880, PMCID: PMC2650279, DOI: 10.1016/j.biopsych.2008.07.029.Peer-Reviewed Original ResearchConceptsMemory taskPrefrontal activityMemory maintenanceBrain activationFunctional Magnetic Resonance Imaging EvidenceWorking Memory MaintenanceCognitive impairmentHealthy comparison participantsPrefrontal cortical activityFunctional magnetic resonanceMemory loadComparison participantsTask accuracyDistinct neurobiologyCortical activityHealthy participantsBasic research insightsImaging EvidenceMemoryCortical deficitsCortical functionPoor performanceTaskSchizophreniaResponse phaseBlunted Psychotomimetic and Amnestic Effects of Δ-9-Tetrahydrocannabinol in Frequent Users of Cannabis
D'Souza DC, Ranganathan M, Braley G, Gueorguieva R, Zimolo Z, Cooper T, Perry E, Krystal J. Blunted Psychotomimetic and Amnestic Effects of Δ-9-Tetrahydrocannabinol in Frequent Users of Cannabis. Neuropsychopharmacology 2008, 33: 2505-2516. PMID: 18185500, PMCID: PMC3799954, DOI: 10.1038/sj.npp.1301643.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAmnesiaAttentionBrainDose-Response Relationship, DrugDouble-Blind MethodDronabinolDrug Administration ScheduleDrug ToleranceFemaleHallucinationsHallucinogensHumansHydrocortisoneMaleMarijuana AbuseMiddle AgedPerceptual DisordersProlactinPsychoses, Substance-InducedTachycardiaYoung AdultConceptsAmnestic effectsPerceptual alterationsDelta-9-TetrahydrocannabinolCannabis useSubjective effectsFrequent usersCannabisEffects of cannabinoidsIllicit substancesPsychotomimetic effectsEuphoric effectsHealthy controlsHealthy individualsMemoryImpairingPsychosisDose-related effectsIndividualsCortisolPsychotomimeticsAttentionPeopleUsersPlacebo-controlled studyEffect
2006
Greater vulnerability to the amnestic effects of ketamine in males
Morgan CJ, Perry EB, Cho HS, Krystal JH, D’Souza D. Greater vulnerability to the amnestic effects of ketamine in males. Psychopharmacology 2006, 187: 405-414. PMID: 16896964, DOI: 10.1007/s00213-006-0409-0.Peer-Reviewed Original ResearchConceptsAmnestic effectsProcessing of wordsGeneral cognitive functioningGreater performance decrementsGreater subjective senseGender differencesObjectivesThe current studyGreater vulnerabilityCognitive measuresCognitive differencesCognitive functioningPerceptual alterationsPerformance decrementsNMDA-R functionAttention dataMemory impairmentSubjective senseNegative symptomsCurrent studyFunctioningHVLTKetamine studiesAnxietyMemoryKetamine administration
2005
Effects of smoking and smoking abstinence on cognition in adolescent tobacco smokers
Jacobsen LK, Krystal JH, Mencl WE, Westerveld M, Frost SJ, Pugh KR. Effects of smoking and smoking abstinence on cognition in adolescent tobacco smokers. Biological Psychiatry 2005, 57: 56-66. PMID: 15607301, DOI: 10.1016/j.biopsych.2004.10.022.Peer-Reviewed Original ResearchConceptsAdolescent smokersVerbal memoryTobacco cravingAdolescent daily smokersNicotine withdrawalAdolescent tobacco smokersDaily tobacco smokersDivided attentionVerbal learningCognitive enhancementMemory performanceSustained attentionCognitive performanceGeneral intelligenceAdolescent nonsmokersPerformance decrementsParental educational attainmentFemale smokersDepressed moodMemoryAffective symptomsDaily smokersRecency of smokingTobacco smokersEarly age
2004
Preliminary evidence of attenuation of the disruptive effects of the NMDA glutamate receptor antagonist, ketamine, on working memory by pretreatment with the group II metabotropic glutamate receptor agonist, LY354740, in healthy human subjects
Krystal JH, Abi-Saab W, Perry E, D’Souza D, Liu N, Gueorguieva R, McDougall L, Hunsberger T, Belger A, Levine L, Breier A. Preliminary evidence of attenuation of the disruptive effects of the NMDA glutamate receptor antagonist, ketamine, on working memory by pretreatment with the group II metabotropic glutamate receptor agonist, LY354740, in healthy human subjects. Psychopharmacology 2004, 179: 303-309. PMID: 15309376, DOI: 10.1007/s00213-004-1982-8.Peer-Reviewed Original ResearchConceptsGroup II metabotropic glutamate receptor agonistMetabotropic glutamate receptor agonistHealthy human subjectsNMDA glutamate receptor antagonistGlutamate receptor agonistsGlutamate receptor antagonistsTest dayCognitive effectsPerceptual changesKetamine infusionReceptor antagonistReceptor agonistDysphoric moodMemory impairmentBehavioral consequencesSignificant dose-related improvementGroup II mGluR agonistReceptor functionHuman subjectsMemoryNegative symptomsDose-related improvementNMDA receptor functionPreliminary evidenceDisruptive effects
2003
Preliminary evidence of hippocampal dysfunction in adolescent MDMA (“ecstasy”) users: possible relationship to neurotoxic effects
Jacobsen LK, Mencl WE, Pugh KR, Skudlarski P, Krystal JH. Preliminary evidence of hippocampal dysfunction in adolescent MDMA (“ecstasy”) users: possible relationship to neurotoxic effects. Psychopharmacology 2003, 173: 383-390. PMID: 14647960, DOI: 10.1007/s00213-003-1679-4.Peer-Reviewed Original ResearchConceptsFunctional magnetic resonance imagingMDMA usersCognitive deficitsMDMA useBrain functionDivided attentionMemory taskMemory loadResultsMDMA usersLeft hippocampusHippocampal dysfunctionSubstance useCognitive impairmentAdolescencePreliminary evidenceReaction timeDevelopmental impactPilot sampleDeficitsMDMAMagnetic resonance imagingIQAttentionMemoryHippocampusReactions to and memories for the September 11, 2001 terrorist attacks in adults with posttraumatic stress disorder
Qin J, Mitchell K, Johnson M, Krystal J, Southwick S, Rasmusson A, Allen E. Reactions to and memories for the September 11, 2001 terrorist attacks in adults with posttraumatic stress disorder. Applied Cognitive Psychology 2003, 17: 1081-1097. DOI: 10.1002/acp.987.Peer-Reviewed Original ResearchPosttraumatic stress disorderEvent memoryPTSD participantsAccelerated memory declineSubsequent memorySignificant forgettingAutobiographical memoryTrauma control groupPTSD groupEmotional reactionsMemory declineStress disorderEmotional aspectsControl participantsMemoryFactual detailsSubject comparisonsParticipantsForgettingVeteran statusTerrorist attacksIndividualsDisordersClientsMeasuresToward early pharmacological posttraumatic stress intervention
Morgan CA, Krystal JH, Southwick SM. Toward early pharmacological posttraumatic stress intervention. Biological Psychiatry 2003, 53: 834-843. PMID: 12725976, DOI: 10.1016/s0006-3223(03)00116-1.Peer-Reviewed Original ResearchConceptsPosttraumatic stress disorderExtreme psychological traumaStress-related symptomsIntrusive memoriesPsychological processingExtreme arousalTrauma survivorsPsychological traumaStress disorderStress interventionsAcute aftermathExtreme stressPharmacologic interventionsAdaptive roleEffective pharmacologic interventionsPotential pharmacologic interventionsInterventionTransient symptomsImmediate aftermathArousalEmpirical dataEarly symptomsMemorySymptomsTrauma