2010
Working Memory Overload: Fronto-Limbic Interactions and Effects on Subsequent Working Memory Function
Yun RJ, Krystal JH, Mathalon DH. Working Memory Overload: Fronto-Limbic Interactions and Effects on Subsequent Working Memory Function. Brain Imaging And Behavior 2010, 4: 96-108. PMID: 20503117, PMCID: PMC2854358, DOI: 10.1007/s11682-010-9089-9.Peer-Reviewed Original ResearchConceptsMemory systemAmygdala-prefrontal interactionsSubsequent cognitive performanceWorking Memory FunctionFunctional magnetic resonanceDorsolateral prefrontal cortexMemory taskCognitive functioningNegative affectAmygdala activationCognitive performanceTask performanceCognitive overloadNeural effectsPrefrontal cortexMemory functionPerformance accuracySubsequent functioningSeparate factorsBrain regionsPerformance declineReduced activationFunctioningInverse couplingOverload effect
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 phase
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 imagingIQAttentionMemoryHippocampus
1998
Dissociation of mnemonic and perceptual processes during spatial and nonspatial working memory using fMRI
Belger A, Puce A, Krystal J, Gore J, Goldman‐Rakic P, McCarthy G. Dissociation of mnemonic and perceptual processes during spatial and nonspatial working memory using fMRI. Human Brain Mapping 1998, 6: 14-32. PMID: 9673660, PMCID: PMC6873355, DOI: 10.1002/(sici)1097-0193(1998)6:1<14::aid-hbm2>3.0.co;2-o.Peer-Reviewed Original ResearchConceptsMiddle frontal gyrusPerceptual control taskMemory taskIntraparietal sulcusPerceptual domainFrontal gyrusLeft hemisphereExperiment 1Parietal cortexControl taskLeft inferior frontal gyrusRight middle frontal gyrusInferior occipitotemporal cortexNonspatial working memoryCommon brain regionsInferior frontal gyrusVentral visual pathwayDomain-specific activationFunctional magnetic resonanceInferior parietal cortexDorsolateral prefrontal cortexPerceptual processingWorking memoryPerceptual processesMnemonic demands
1996
Activation of Human Prefrontal Cortex during Spatial and Nonspatial Working Memory Tasks Measured by Functional MRI
McCarthy G, Puce A, Constable T, Krystal J, Gore J, Goldman-Rakic P. Activation of Human Prefrontal Cortex during Spatial and Nonspatial Working Memory Tasks Measured by Functional MRI. Cerebral Cortex 1996, 6: 600-611. PMID: 8670685, DOI: 10.1093/cercor/6.4.600.Peer-Reviewed Original ResearchConceptsMiddle frontal gyrusMemory taskPrefrontal cortexHuman prefrontal cortexShape taskFrontal gyrusLeft hemisphereNonspatial working memory tasksSuccessive visual stimuliWorking Memory TaskInferior frontal gyrusTarget detection taskFunctional magnetic resonanceMnemonic contentMnemonic componentsPFC activationMemory domainAreas of activationMemory processesTask onsetVisual stimuliHemispheric activationRight hemisphereDetection taskFunctional MRI