2013
Amygdala Connectivity Differs Among Chronic, Early Course, and Individuals at Risk for Developing Schizophrenia
Anticevic A, Tang Y, Cho YT, Repovs G, Cole MW, Savic A, Wang F, Krystal JH, Xu K. Amygdala Connectivity Differs Among Chronic, Early Course, and Individuals at Risk for Developing Schizophrenia. Schizophrenia Bulletin 2013, 40: 1105-1116. PMID: 24366718, PMCID: PMC4133672, DOI: 10.1093/schbul/sbt165.Peer-Reviewed Original ResearchConceptsHealthy comparison subjectsAmygdala connectivityHigh riskSymptom severityOrbitofrontal cortexWhole-brain functional connectivityHR individualsResting-state connectivitySchizophrenia symptom severityFunctional magnetic resonanceAmygdala seedArousal nucleiInitial episodeSchizophrenia neuropathologyChronic schizophreniaBrainstem regionsIllness phasePsychosis onsetElevated riskAmygdala circuitsEarly courseComparison subjectsFunctional alterationsClinical groupsFunctional connectivityRelationship of resting brain hyperconnectivity and schizophrenia-like symptoms produced by the NMDA receptor antagonist ketamine in humans
Driesen NR, McCarthy G, Bhagwagar Z, Bloch M, Calhoun V, D'Souza DC, Gueorguieva R, He G, Ramachandran R, Suckow RF, Anticevic A, Morgan PT, Krystal JH. Relationship of resting brain hyperconnectivity and schizophrenia-like symptoms produced by the NMDA receptor antagonist ketamine in humans. Molecular Psychiatry 2013, 18: 1199-1204. PMID: 23337947, PMCID: PMC3646075, DOI: 10.1038/mp.2012.194.Peer-Reviewed Original ResearchConceptsFunctional connectivityNegative symptomsGamma-aminobutyric acid (GABA) neuronsNMDA receptor antagonist ketamineAspartate glutamate receptor antagonistContinuous ketamine infusionGlutamate receptor antagonistsNMDA-R antagonistsCortical functional connectivityNMDA-R antagonist ketamineSchizophrenia-like symptomsHealthy human subjectsNegative Syndrome ScaleBrain functional connectivityPrimary samplesRegion-specific mannerFunctional magnetic resonanceKetamine infusionReceptor antagonistPathological increaseSyndrome ScaleSymptomsPreclinical researchKetamineBrain oscillations
2012
Global Prefrontal and Fronto-Amygdala Dysconnectivity in Bipolar I Disorder with Psychosis History
Anticevic A, Brumbaugh MS, Winkler AM, Lombardo LE, Barrett J, Corlett PR, Kober H, Gruber J, Repovs G, Cole MW, Krystal JH, Pearlson GD, Glahn DC. Global Prefrontal and Fronto-Amygdala Dysconnectivity in Bipolar I Disorder with Psychosis History. Biological Psychiatry 2012, 73: 565-573. PMID: 22980587, PMCID: PMC3549314, DOI: 10.1016/j.biopsych.2012.07.031.Peer-Reviewed Original ResearchConceptsPsychosis historyRisk factorsBipolar patientsSymptom severityResting-state functional magnetic resonanceAmygdala-mPFC connectivityFronto-limbic dysfunctionSevere clinical courseBipolar I patientsEmotion regulation regionsPsychotic symptom severityFunctional magnetic resonanceClinical courseI patientsLimbic structuresBipolar illnessConnectivity deficitsAmygdala findingsConnectivity abnormalitiesPathophysiological modelBipolar IPatientsBipolar disorderDysconnectivityAbnormal inhibition
2011
Working Memory Encoding and Maintenance Deficits in Schizophrenia: Neural Evidence for Activation and Deactivation Abnormalities
Anticevic A, Repovs G, Barch DM. Working Memory Encoding and Maintenance Deficits in Schizophrenia: Neural Evidence for Activation and Deactivation Abnormalities. Schizophrenia Bulletin 2011, 39: 168-178. PMID: 21914644, PMCID: PMC3523909, DOI: 10.1093/schbul/sbr107.Peer-Reviewed Original ResearchConceptsSCZ subjectsWM pathologySample WM taskWhole-brain levelDorsolateral prefrontal cortex functioningDefault mode systemFunctional magnetic resonanceHealthy subjectsWM phasesAbnormalitiesSchizophreniaWM areasActivation differencesLess recruitmentPrefrontal regionsMaintenance phaseDeficitsPrefrontal cortex functioningSubstantial evidencePathologySubjectsMaintenance deficitsRecent findingsActivationMagnetic resonanceNegative and Nonemotional Interference with Visual Working Memory in Schizophrenia
Anticevic A, Repovs G, Corlett PR, Barch DM. Negative and Nonemotional Interference with Visual Working Memory in Schizophrenia. Biological Psychiatry 2011, 70: 1159-1168. PMID: 21861986, DOI: 10.1016/j.biopsych.2011.07.010.Peer-Reviewed Original ResearchMeSH KeywordsAdultAmygdalaAnalysis of VarianceArousalAttentionCase-Control StudiesCerebral CortexDiscrimination, PsychologicalEmotionsFemaleField Dependence-IndependenceHumansLinear ModelsMagnetic Resonance ImagingMaleMatched-Pair AnalysisMemory, Short-TermMiddle AgedReference ValuesSchizophreniaSchizophrenic PsychologyVisual PerceptionConceptsControl subjectsSCZ subjectsDSM-IV-diagnosed schizophreniaAberrant salience processingLevel-dependent imagingAbility of patientsFunctional magnetic resonance imagingMagnetic resonance imagingPosterior cortical regionsFunctional magnetic resonanceLevel-dependent activityPathophysiological mechanismsPatientsResonance imagingCortical regionsAberrant responsesSalience processingSchizophreniaPrefrontal regionsEffects of distractionSubjectsSpecific deficitsDeficitsMagnetic resonanceSimilar responses