2024
Stability of infraslow correlation structure in time-shifted intracranial EEG signals
Joshi R, Duckrow R, Goncharova I, Hirsch L, Spencer D, Godwin D, Zaveri H. Stability of infraslow correlation structure in time-shifted intracranial EEG signals. Frontiers In Network Physiology 2024, 4: 1441294. PMID: 39258030, PMCID: PMC11384574, DOI: 10.3389/fnetp.2024.1441294.Peer-Reviewed Original ResearchInfraslow activityContact pairsFrequency bandMagnitude-squared coherenceAntiseizure medicationsMedically refractory epilepsy patientsElectrode contact pairsHigher-frequency activityRefractory epilepsy patientsDC-coupled recordingsIcEEG epochsEEG frequency bandsEnvelope correlationOptimal parametersClinical relevanceSeizure riskIntracranial EEGEpilepsy patientsPatientsIntracranial EEG signalsTaperTraditional EEG frequency bands
2021
Video quality using outpatient smartphone videos in epilepsy: Results from the OSmartViE study
Tatum WO, Hirsch LJ, Gelfand MA, Acton EK, LaFrance WC, Duckrow RB, Chen D, Blum AS, Hixson J, Drazkowski J, Benbadis S, Cascino GD, Collaborators T. Video quality using outpatient smartphone videos in epilepsy: Results from the OSmartViE study. European Journal Of Neurology 2021, 28: 1453-1462. PMID: 33465822, DOI: 10.1111/ene.14744.Peer-Reviewed Original ResearchConceptsPsychogenic nonepileptic attacksNeurologic eventsEpileptic seizuresInpatient video-electroencephalography (EEG) monitoringPhysiologic nonepileptic eventsMulticenter cohort studyMajority of patientsVideo-electroencephalography monitoringVideo-EEG monitoringSimilar diagnostic accuracyHome video recordingEpilepsy outpatientsNeurological disease statesCohort studyNeurological eventsNonepileptic eventsNonepileptic attacksUnknown diagnosisAdequate durationClinical informationPatientsSenior neurology residentsAccurate diagnosisDiagnostic accuracyNeurology residents
2020
Beyond implantation effect? Long-term seizure reduction and freedom following intracranial monitoring without additional surgical interventions
Percy J, Zaveri H, Duckrow RB, Gerrard J, Farooque P, Hirsch LJ, Spencer DD, Sivaraju A. Beyond implantation effect? Long-term seizure reduction and freedom following intracranial monitoring without additional surgical interventions. Epilepsy & Behavior 2020, 111: 107231. PMID: 32615416, DOI: 10.1016/j.yebeh.2020.107231.Peer-Reviewed Original ResearchConceptsLong-term seizure freedomSeizure freedomSeizure frequencyElectrode implantationIntracranial studiesLong-term seizure reductionAdditional surgical interventionSeizure onset localizationIntracranial electroencephalogram monitoringSeizure reductionConsecutive patientsSurgical interventionEpileptogenic networksElectroencephalogram monitoringNeuromodulatory effectsRetrospective analysisIntracranial monitoringTransient improvementDepth electrodesPatientsYear 4ImplantationAdequate dataYears
2018
Seizure susceptibility and infraslow modulatory activity in the intracranial electroencephalogram
Joshi RB, Duckrow RB, Goncharova II, Gerrard JL, Spencer DD, Hirsch LJ, Godwin DW, Zaveri HP. Seizure susceptibility and infraslow modulatory activity in the intracranial electroencephalogram. Epilepsia 2018, 59: 2075-2085. PMID: 30187919, DOI: 10.1111/epi.14559.Peer-Reviewed Original ResearchConceptsAED taperYale-New Haven HospitalAdult epilepsy patientsSeizure forecasting algorithmsElectrode contact pairsSeizure onset areaSeizure susceptibilityClinical recordsDrug taperElectrophysiological changesEpilepsy patientsIntracranial electroencephalographic dataMagnitude-squared coherenceModulatory activitySeizuresPatientsOnset areaPreseizurePostseizureProgressive desynchronizationIntracranial electroencephalogramDaysIctogenesisEffect of timeHospitalSudden unexpected death in epilepsy in patients treated with brain‐responsive neurostimulation
Devinsky O, Friedman D, Duckrow RB, Fountain NB, Gwinn RP, Leiphart JW, Murro AM, Van Ness PC. Sudden unexpected death in epilepsy in patients treated with brain‐responsive neurostimulation. Epilepsia 2018, 59: 555-561. PMID: 29336029, DOI: 10.1111/epi.13998.Peer-Reviewed Original ResearchConceptsSudden unexpected deathDefinite SUDEPEpileptiform activityUnexpected deathBrain-responsive neurostimulationFrequent epileptiform activityDrug Administration approvalRNS SystemTime of deathSUDEP ratesWitnessed seizurePlacebo armResective surgerySUDEP riskClinical featuresImplant yearAdministration approvalClinical trialsEpilepsy patientsSUDEPPatientsSeizuresDrug studiesU.S. FoodDeath
2016
The relationship between seizures, interictal spikes and antiepileptic drugs
Goncharova II, Alkawadri R, Gaspard N, Duckrow RB, Spencer DD, Hirsch LJ, Spencer SS, Zaveri HP. The relationship between seizures, interictal spikes and antiepileptic drugs. Clinical Neurophysiology 2016, 127: 3180-3186. PMID: 27292227, DOI: 10.1016/j.clinph.2016.05.014.Peer-Reviewed Original ResearchConceptsFirst seizureSeizure occurrenceAED taperSpike rateEEG monitoringMarker of inhibitionIntracranial EEG monitoringOccurrence of seizuresScalp EEG monitoringConsecutive patientsAntiepileptic drugsDrug taperHigh spike ratesInterictal spikesSeizuresDay 4Intracranial electrodesPatientsAEDsSignificant relationship
2014
The spatial and signal characteristics of physiologic high frequency oscillations
Alkawadri R, Gaspard N, Goncharova II, Spencer DD, Gerrard JL, Zaveri H, Duckrow RB, Blumenfeld H, Hirsch LJ. The spatial and signal characteristics of physiologic high frequency oscillations. Epilepsia 2014, 55: 1986-1995. PMID: 25470216, PMCID: PMC5123742, DOI: 10.1111/epi.12851.Peer-Reviewed Original ResearchConceptsPhysiologic high-frequency oscillationsSeizure onsetEpileptic networkNon-rapid eye movement sleepComprehensive Epilepsy CenterMesial temporal structuresEye movement sleepHighest HFO ratesHigh-frequency oscillationsFirst seizureInvasive evaluationEpilepsy centersIntracranial evaluationMovement sleepPerirolandic regionEpileptiform dischargesParietooccipital regionOccipital lobeEpileptic sitesPatientsNonepileptic regionsPhysiologic eventsFast ripplesHFO ratesLonger durationSubclinical seizures during intracranial EEG recording: Are they clinically significant?
Farooque P, Duckrow R. Subclinical seizures during intracranial EEG recording: Are they clinically significant? Epilepsy Research 2014, 108: 1790-1796. PMID: 25306063, DOI: 10.1016/j.eplepsyres.2014.09.020.Peer-Reviewed Original ResearchConceptsPoor surgical outcomesGood surgical outcomeSubclinical seizuresSurgical outcomesClinical seizuresIntracranial EEG recordingsGroup 2Group 1Extra-temporal lobe epilepsySeizure onset regionEEG recordingsExtra-temporal originResection correlatesSurgical resectionLobe epilepsyPoor outcomePrognostic valueClinical significanceBetter outcomesPatientsSeizuresEpileptic networkOnset zoneDifferent anatomical regionsEpilepsy database
2013
Intracranially recorded interictal spikes: Relation to seizure onset area and effect of medication and time of day
Goncharova II, Spencer SS, Duckrow RB, Hirsch LJ, Spencer DD, Zaveri HP. Intracranially recorded interictal spikes: Relation to seizure onset area and effect of medication and time of day. Clinical Neurophysiology 2013, 124: 2119-2128. PMID: 23856192, DOI: 10.1016/j.clinph.2013.05.027.Peer-Reviewed Original ResearchIntracranial EEG evaluation of relationship within a resting state network
Duncan D, Duckrow RB, Pincus SM, Goncharova I, Hirsch LJ, Spencer DD, Coifman RR, Zaveri HP. Intracranial EEG evaluation of relationship within a resting state network. Clinical Neurophysiology 2013, 124: 1943-1951. PMID: 23790525, DOI: 10.1016/j.clinph.2013.03.028.Peer-Reviewed Original ResearchConceptsDefault mode networkIntracranial EEG evaluationMode networkLocalization-related epilepsyCross-approximate entropyNeuronal involvementHemodynamic measurementsIntracranial EEG recordingsEEG evaluationBackground activityGamma powerFMRI studyIntracranial EEGBrain activityPatientsEEG recordingsLow levelsT2EpilepsyMagnitude squared coherenceT1
2012
Metabolic networks in epilepsy by MR spectroscopic imaging
Pan JW, Spencer DD, Kuzniecky R, Duckrow RB, Hetherington H, Spencer SS. Metabolic networks in epilepsy by MR spectroscopic imaging. Acta Neurologica Scandinavica 2012, 126: 411-420. PMID: 22574807, PMCID: PMC3600585, DOI: 10.1111/j.1600-0404.2012.01665.x.Peer-Reviewed Original ResearchConceptsMTLE patientsBasal gangliaEpileptic networkMesial temporal lobe epilepsy patientsTemporal lobe epilepsy patientsLimbic seizure propagationBilateral basal gangliaNAA/CrMR spectroscopicIpsilateral insulaSeizure propagationBilateral hippocampusEpilepsy patientsHuman studiesIndependent factorsPatientsNeuronal functionThalamusGangliaEpilepsyInsulaFactor analysisFactorsHippocampusInjurySelective homonuclear polarization transfer for spectroscopic imaging of GABA at 7T
Pan JW, Duckrow RB, Spencer DD, Avdievich NI, Hetherington HP. Selective homonuclear polarization transfer for spectroscopic imaging of GABA at 7T. Magnetic Resonance In Medicine 2012, 69: 310-316. PMID: 22505305, PMCID: PMC3407348, DOI: 10.1002/mrm.24283.Peer-Reviewed Original ResearchConceptsEpilepsy patientsN-acetyl aspartate ratioSupplementary motor areaControl volunteersThalamic GABAMotor areaAspartate ratioGABAGABA resonancePatientsSingle-shot methodHuman brainPolarization transfer methodsPolarization transferMacromolecule resonancesHomonuclear polarization transferSpectroscopic imagingThalamusSuppression pulses
2010
A prospective study of loss of consciousness in epilepsy using virtual reality driving simulation and other video games
Yang L, Morland TB, Schmits K, Rawson E, Narasimhan P, Motelow JE, Purcaro MJ, Peng K, Raouf S, DeSalvo MN, Oh T, Wilkerson J, Bod J, Srinivasan A, Kurashvili P, Anaya J, Manza P, Danielson N, Ransom CB, Huh L, Elrich S, Padin-Rosado J, Naidu Y, Detyniecki K, Hamid H, Farooque P, Astur R, Xiao B, Duckrow RB, Blumenfeld H. A prospective study of loss of consciousness in epilepsy using virtual reality driving simulation and other video games. Epilepsy & Behavior 2010, 18: 238-246. PMID: 20537593, PMCID: PMC2914099, DOI: 10.1016/j.yebeh.2010.04.011.Peer-Reviewed Original ResearchConceptsVideo gamesVirtual realityComputer-based tasksDaily lifePerformance dataProspective studyEssential partGameContinuous video/EEG monitoringVideo/EEG monitoringTraffic accidentsSimulatorNetworkTaskNormal daily lifeSeizure typesDrivingEEG monitoringSeizuresDriving impairmentPatientsImpair consciousnessSpecific typesAnatomical networksReality
2009
Spatial distribution of intracranially recorded spikes in medial and lateral temporal epilepsies
Goncharova II, Zaveri HP, Duckrow RB, Novotny EJ, Spencer SS. Spatial distribution of intracranially recorded spikes in medial and lateral temporal epilepsies. Epilepsia 2009, 50: 2575-2585. PMID: 19674048, DOI: 10.1111/j.1528-1167.2009.02258.x.Peer-Reviewed Original ResearchConceptsMedial temporal structuresInterictal spikesLT patientsCortical areasNeocortical seizure onsetsSleep-related increaseSpike rateLateral temporal epilepsyExtratemporal areasTemporal epilepsySeizure onsetIntracranial monitoringLT groupMT groupPatientsFrontal spikesSeizuresGreater numberSleepGroupTemporal structureEpilepsySpikesA decrease in EEG energy accompanies anti-epileptic drug taper during intracranial monitoring
Zaveri HP, Pincus SM, Goncharova II, Novotny EJ, Duckrow RB, Spencer DD, Spencer SS. A decrease in EEG energy accompanies anti-epileptic drug taper during intracranial monitoring. Epilepsy Research 2009, 86: 153-162. PMID: 19632096, DOI: 10.1016/j.eplepsyres.2009.06.002.Peer-Reviewed Original ResearchLocalization-related epilepsy exhibits significant connectivity away from the seizure-onset area
Zaveri HP, Pincus SM, Goncharova II, Duckrow RB, Spencer DD, Spencer SS. Localization-related epilepsy exhibits significant connectivity away from the seizure-onset area. Neuroreport 2009, 20: 891-895. PMID: 19424095, DOI: 10.1097/wnr.0b013e32832c78e0.Peer-Reviewed Original ResearchConceptsSeizure onset areaLocalization-related epilepsyControl of seizuresDiscrete cortical areasStandard clinical proceduresBeta frequency bandsUnselected patientsComplete resectionEpilepsy surgeryCortical areasFunctional connectivitySeizuresClinical proceduresEpilepsyIntracranial electroencephalogramSignificant connectivityResectionPatientsSurgery
2008
Local spatial effect of 50 Hz cortical stimulation in humans
Gwinn RP, Spencer DD, Spencer SS, Duckrow RB, Vives K, Wu K, Tkeshelashvili D, Zaveri HP. Local spatial effect of 50 Hz cortical stimulation in humans. Epilepsia 2008, 49: 1602-1610. PMID: 18435750, DOI: 10.1111/j.1528-1167.2008.01628.x.Peer-Reviewed Original ResearchConceptsCortical stimulationStimulation amplitudeBipolar stimulationFunctional cortical mappingSeizure activityFunctional mapping proceduresCortical mappingEfficacious treatmentSubdural electrodesCortical activityStimulation parametersHuman investigationsStimulating parametersStimulationTissue volumeElectrode placementCortical surfacePatientsGreater increaseBaselineFunctional mappingGamma bandBand powerStimuliS poststimulation
2001
Distinguishing Subtypes of Temporal Lobe Epilepsy with Background Hippocampal Activity
Zaveri H, Duckrow R, De Lanerolle N, Spencer S. Distinguishing Subtypes of Temporal Lobe Epilepsy with Background Hippocampal Activity. Epilepsia 2001, 42: 725-730. PMID: 11422326, DOI: 10.1046/j.1528-1157.2001.00500.x.Peer-Reviewed Original ResearchConceptsMesial temporal sclerosisTemporal lobe epilepsyLobe epilepsySurgical outcomesIntractable temporal lobe epilepsyPoor surgical outcomesGood surgical outcomeMedial temporal structuresMedial temporal lobeDelta band powerTemporal sclerosisRetrospective studyHippocampal tissueBackground EEGSeizure onsetIndividual patientsSurgical proceduresIntracranial monitoringTemporal lobeGamma frequency bandClinical observationsPatientsAnterior hippocampusCell lossSubtypes
1997
Concurrence of Graves' Disease and Dysplastic Cerebral Blood Vessels of the Moyamoya Variety
Tendler BE, Shoukri K, Malchoff C, MacGillivray D, Duckrow R, Talmadge T, Ramsby GR. Concurrence of Graves' Disease and Dysplastic Cerebral Blood Vessels of the Moyamoya Variety. Thyroid 1997, 7: 625-629. PMID: 9292953, DOI: 10.1089/thy.1997.7.625.Peer-Reviewed Original ResearchConceptsRadioactive iodine therapyDisease 10 yearsGraves' diseaseIodine therapyAcute cerebrovascular ischemiaSafe therapeutic alternativeLong-term efficacyCerebral blood vesselsAutoimmune mechanismsCerebrovascular ischemiaMoyamoya phenomenonMoyamoya diseaseAntithyroid drugsOptimal treatmentCerebral vesselsCaucasian womenTherapeutic alternativeHyperthyroidismDiseasePatientsBlood vesselsLimited experienceTherapyVesselsThyroidectomy