2013
The Impact of NMDA Receptor Blockade on Human Working Memory-Related Prefrontal Function and Connectivity
Driesen NR, McCarthy G, Bhagwagar Z, Bloch MH, Calhoun VD, D'Souza DC, Gueorguieva R, He G, Leung HC, Ramani R, Anticevic A, Suckow RF, Morgan PT, Krystal JH. The Impact of NMDA Receptor Blockade on Human Working Memory-Related Prefrontal Function and Connectivity. Neuropsychopharmacology 2013, 38: 2613-2622. PMID: 23856634, PMCID: PMC3828532, DOI: 10.1038/npp.2013.170.Peer-Reviewed Original ResearchConceptsNMDA-Rs
2012
A broken filter: Prefrontal functional connectivity abnormalities in schizophrenia during working memory interference
Anticevic A, Repovs G, Krystal JH, Barch DM. A broken filter: Prefrontal functional connectivity abnormalities in schizophrenia during working memory interference. Schizophrenia Research 2012, 141: 8-14. PMID: 22863548, PMCID: PMC3879404, DOI: 10.1016/j.schres.2012.07.007.Peer-Reviewed Original ResearchMeSH KeywordsAdultAnalysis of VarianceBrain MappingFemaleFunctional LateralityHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMaleMemory DisordersMemory, Short-TermMiddle AgedNerve NetNeural PathwaysNeuropsychological TestsOxygenPrefrontal CortexSchizophreniaSchizophrenic PsychologyConceptsFunctional connectivity abnormalitiesConnectivity abnormalitiesMedio-dorsal thalamusTask-based functional connectivityFinal common pathwayMaintenance phasePrefrontal cortical regionsDorsolateral prefrontal cortex activationPrefrontal cortex activationFunctional deficitsHealthy controlsSub-cortical regionsExtended amygdalaPatientsCortex activationCognitive deficitsCortical regionsFunctional connectivityLife outcomesAbnormalitiesDLPFC networkCommon pathwaySchizophrenia researchSchizophreniaMemory abnormalities
2011
Reduced Amygdala Serotonin Transporter Binding in Posttraumatic Stress Disorder
Murrough JW, Huang Y, Hu J, Henry S, Williams W, Gallezot JD, Bailey CR, Krystal JH, Carson RE, Neumeister A. Reduced Amygdala Serotonin Transporter Binding in Posttraumatic Stress Disorder. Biological Psychiatry 2011, 70: 1033-1038. PMID: 21855859, PMCID: PMC3207037, DOI: 10.1016/j.biopsych.2011.07.003.Peer-Reviewed Original ResearchConceptsPosttraumatic stress disorderMontgomery-Åsberg Depression Rating Scale scoresDepression Rating Scale scoresPositron emission tomography scanStress disorderAbnormal amygdala activityEmission tomography scanHealthy control subjectsHamilton Rating ScaleRating Scale scoresBetween-group differencesSerotonin transporter bindingPositron emission tomographyControl subjectsTomography scanTransporter bindingHC groupAmygdala regionPTSD patientsLeft amygdalaScale scoreDepression symptomsEmission tomographyAmygdalaPTSD group
2010
Sex-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
2008
Decreased hippocampal volume on MRI is associated with increased extracellular glutamate in epilepsy patients
Cavus I, Pan JW, Hetherington HP, Abi‐Saab W, Zaveri HP, Vives KP, Krystal JH, Spencer SS, Spencer DD. Decreased hippocampal volume on MRI is associated with increased extracellular glutamate in epilepsy patients. Epilepsia 2008, 49: 1358-1366. PMID: 18410365, DOI: 10.1111/j.1528-1167.2008.01603.x.Peer-Reviewed Original ResearchConceptsTemporal lobe epilepsyHippocampal volumeClinical factorsHippocampal atrophyEpileptogenic hippocampusGABA levelsNeurochemical levelsElevated extracellular glutamate levelsContralateral hippocampal volumeIntracranial EEG evaluationMedication-resistant epilepsyRefractory TLE patientsHigh seizure frequencyRelevant clinical factorsSmaller hippocampal volumesExtracellular glutamate levelsFebrile seizure historyTreatment of epilepsySeizure frequencyLobe epilepsySeizure historyTLE patientsAtrophic hippocampusGlutamate levelsExtracellular glutamate
2005
First in vivo evidence of an NMDA receptor deficit in medication-free schizophrenic patients
Pilowsky LS, Bressan RA, Stone JM, Erlandsson K, Mulligan RS, Krystal JH, Ell PJ. First in vivo evidence of an NMDA receptor deficit in medication-free schizophrenic patients. Molecular Psychiatry 2005, 11: 118-119. PMID: 16189506, DOI: 10.1038/sj.mp.4001751.Peer-Reviewed Original ResearchTemporoparietal Transcranial Magnetic Stimulation for Auditory Hallucinations: Safety, Efficacy and Moderators in a Fifty Patient Sample
Hoffman RE, Gueorguieva R, Hawkins KA, Varanko M, Boutros NN, Wu YT, Carroll K, Krystal JH. Temporoparietal Transcranial Magnetic Stimulation for Auditory Hallucinations: Safety, Efficacy and Moderators in a Fifty Patient Sample. Biological Psychiatry 2005, 58: 97-104. PMID: 15936729, DOI: 10.1016/j.biopsych.2005.03.041.Peer-Reviewed Original ResearchConceptsRepetitive transcranial magnetic stimulationTranscranial magnetic stimulationAuditory hallucinationsSham stimulationMagnetic stimulationTemporoparietal repetitive transcranial magnetic stimulationClinical Global Impression ScaleGlobal Impression ScaleRight-handed patientsMotor thresholdImpression ScaleRTMS effectsNew patientsNeurocognitive impairmentHallucination frequencySchizoaffective disorderPatient samplesSignificant distressPatientsChange scoresHallucinationsPreliminary reportStimulationNeurobiological factorsIntervention
2004
Significance of Adolescent Neurodevelopment for the Neural Circuitry of Bipolar Disorder
BLUMBERG HP, KAUFMAN J, MARTIN A, CHARNEY DS, KRYSTAL JH, PETERSON BS. Significance of Adolescent Neurodevelopment for the Neural Circuitry of Bipolar Disorder. Annals Of The New York Academy Of Sciences 2004, 1021: 376-383. PMID: 15251913, DOI: 10.1196/annals.1308.048.Peer-Reviewed Original ResearchConceptsNeural systemsCourse of adolescenceMajor developmental changesExecutive controlAdolescent neurodevelopmentEarly adolescenceLate adolescenceDevelopmental epochsNeural circuitryNeurodevelopmental modelDevelopmental changesEarly adulthoodAdolescenceSubcortical componentsBipolar disorderDeficitsImportant implicationsEmotionsVPFCDisordersAmygdalaEarly signsAdulthoodTreatment strategiesParticular components
2003
A Functional Magnetic Resonance Imaging Study of Bipolar Disorder: State- and Trait-Related Dysfunction in Ventral Prefrontal Cortices
Blumberg HP, Leung HC, Skudlarski P, Lacadie CM, Fredericks CA, Harris BC, Charney DS, Gore JC, Krystal JH, Peterson BS. A Functional Magnetic Resonance Imaging Study of Bipolar Disorder: State- and Trait-Related Dysfunction in Ventral Prefrontal Cortices. JAMA Psychiatry 2003, 60: 601-609. PMID: 12796223, DOI: 10.1001/archpsyc.60.6.601.Peer-Reviewed Original ResearchConceptsVentral prefrontal cortexBipolar disorderPrefrontal cortexMood statesMagnetic resonance imaging studyHealthy control subjectsAcute mood statesLeft ventral prefrontal cortexResonance imaging studySignal changesDisturbances of attentionFunctional magnetic resonance imaging studyAnterior cingulate cortexBipolar disorder IDorsal anterior cingulateEvent-related functional magnetic resonanceFunctional magnetic resonanceAcute episodeControl subjectsExaggerated increaseFunctional impairmentBlunted activationMood episodesSpecific mood statesPrefrontal abnormalitiesTranscranial Magnetic Stimulation of Left Temporoparietal Cortex and Medication-Resistant Auditory Hallucinations
Hoffman RE, Hawkins KA, Gueorguieva R, Boutros NN, Rachid F, Carroll K, Krystal JH. Transcranial Magnetic Stimulation of Left Temporoparietal Cortex and Medication-Resistant Auditory Hallucinations. JAMA Psychiatry 2003, 60: 49-56. PMID: 12511172, DOI: 10.1001/archpsyc.60.1.49.Peer-Reviewed Original ResearchConceptsRepetitive transcranial magnetic stimulationMedication-resistant auditory hallucinationsTranscranial magnetic stimulationLeft temporoparietal cortexAuditory hallucinationsSham stimulationMagnetic stimulationTemporoparietal cortexOpen-label trialMotor thresholdAntipsychotic medicationSustained reductionBrain areasSchizoaffective disorderCortical activationPossible treatmentNeuropsychological impairmentNeuropsychological assessmentPatientsAdditional studiesCortexStimulationTrialsHallucinationsTreatment effects