2016
50 Hz hippocampal stimulation in refractory epilepsy: Higher level of basal glutamate predicts greater release of glutamate
Cavus I, Widi GA, Duckrow RB, Zaveri H, Kennard JT, Krystal J, Spencer DD. 50 Hz hippocampal stimulation in refractory epilepsy: Higher level of basal glutamate predicts greater release of glutamate. Epilepsia 2016, 57: 288-297. PMID: 26749134, DOI: 10.1111/epi.13269.Peer-Reviewed Original ResearchConceptsBasal glutamate levelsRefractory epilepsyGlutamate effluxBasal glutamateGlutamate levelsElectrical stimulationEpileptic hippocampusGlutamate releaseSeizure groupHz stimulationBrain glutamate releaseHippocampus of patientsStimulation-induced increaseEpilepsy monitoring unitStimulation-induced changesEpileptogenic hippocampusInduced seizuresSeizure inductionSpontaneous seizuresInterictal levelsGlutamate increaseAtrophic hippocampusElectroencephalography evaluationHippocampal stimulationHippocampal electrodes
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
2003
Amygdala and Hippocampal Volumes in Adolescents and Adults With Bipolar Disorder
Blumberg HP, Kaufman J, Martin A, Whiteman R, Zhang JH, Gore JC, Charney DS, Krystal JH, Peterson BS. Amygdala and Hippocampal Volumes in Adolescents and Adults With Bipolar Disorder. JAMA Psychiatry 2003, 60: 1201-1208. PMID: 14662552, DOI: 10.1001/archpsyc.60.12.1201.Peer-Reviewed Original ResearchConceptsHippocampal volumeMedial temporal lobe structuresTemporal lobe structuresBipolar disorderIllness featuresVeterans Affairs Medical CenterLobe structuresRepeated-measures statistical analysisCourse of illnessTotal brain volumeAmygdala volume reductionsBD type IAnatomic magnetic resonanceHealthy comparison subjectsPaucity of dataVolume reductionSignificant volume reductionVolumetric abnormalitiesNeurodegenerative changesIllness durationOutpatient treatmentUniversity HospitalGreater effect sizeMedical CenterHippocampal regionNeurotoxicity, Neuroplasticity, and Magnetic Resonance Imaging Morphometry
Mathalon DH, Rapoport JL, Davis KL, Krystal JH. Neurotoxicity, Neuroplasticity, and Magnetic Resonance Imaging Morphometry. JAMA Psychiatry 2003, 60: 846-848. PMID: 12912768, DOI: 10.1001/archpsyc.60.8.846.Peer-Reviewed Original Research