2019
Slowing less than 1 Hz is decreased near the seizure onset zone
Lundstrom BN, Boly M, Duckrow R, Zaveri HP, Blumenfeld H. Slowing less than 1 Hz is decreased near the seizure onset zone. Scientific Reports 2019, 9: 6218. PMID: 30996228, PMCID: PMC6470162, DOI: 10.1038/s41598-019-42347-y.Peer-Reviewed Original ResearchConceptsSeizure onset zoneOnset zoneFocal slowingFocal cerebral dysfunctionLocation of dysfunctionFocal epilepsy patientsSlow wave activitySlow oscillationsLocal synaptic strengthsSlow oscillation activityCerebral dysfunctionReduced inhibitory activityPostictal statePostictal slowingEpilepsy patientsModulatory effectsSynaptic strengthDelta frequencyCortical mechanismsIntracranial recordingsDistinct neural mechanismsIntracranial electroencephalographyNeural mechanismsDysfunctionSleep
2018
Sudden 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
2017
Brain‐responsive neurostimulation in patients with medically intractable mesial temporal lobe epilepsy
Geller EB, Skarpaas TL, Gross RE, Goodman RR, Barkley GL, Bazil CW, Berg MJ, Bergey GK, Cash SS, Cole AJ, Duckrow RB, Edwards JC, Eisenschenk S, Fessler J, Fountain NB, Goldman AM, Gwinn RP, Heck C, Herekar A, Hirsch LJ, Jobst BC, King‐Stephens D, Labar DR, Leiphart JW, Marsh WR, Meador KJ, Mizrahi EM, Murro AM, Nair DR, Noe KH, Park YD, Rutecki PA, Salanova V, Sheth RD, Shields DC, Skidmore C, Smith MC, Spencer DC, Srinivasan S, Tatum W, Van Ness PC, Vossler DG, Wharen RE, Worrell GA, Yoshor D, Zimmerman RS, Cicora K, Sun FT, Morrell MJ. Brain‐responsive neurostimulation in patients with medically intractable mesial temporal lobe epilepsy. Epilepsia 2017, 58: 994-1004. PMID: 28398014, DOI: 10.1111/epi.13740.Peer-Reviewed Original ResearchConceptsMesial temporal lobe epilepsyMesial temporal sclerosisSeizure-free periodTemporal lobe epilepsySeizure reductionAdverse eventsLobe epilepsyIntractable mesial temporal lobe epilepsySerious device-related adverse eventsIntractable partial-onset seizuresMedian percent seizure reductionMesial temporal lobe originBilateral mesial temporal lobe epilepsyDevice-related adverse eventsBrain-responsive neurostimulationImplant site infectionPercent seizure reductionPartial-onset seizuresProspective clinical trialsTemporal lobe originVagus nerve stimulationEffective treatment optionPercent of subjectsPreimplantation baselineTemporal sclerosis
2016
Regional and network relationship in the intracranial EEG second spectrum
Joshi RB, Gaspard N, Goncharova II, Duckrow RB, Duncan D, Gerrard JL, Spencer DD, Hirsch LJ, Zaveri HP. Regional and network relationship in the intracranial EEG second spectrum. Clinical Neurophysiology 2016, 127: 3485-3491. PMID: 27692590, DOI: 10.1016/j.clinph.2016.09.003.Peer-Reviewed Original ResearchProgressive change in sleep over multiple nights of intracranial EEG monitoring
Joshi RB, Gaspard N, Goncharova II, Pavlova M, Duckrow RB, Gerrard JL, Spencer DD, Hirsch LJ, Zaveri HP. Progressive change in sleep over multiple nights of intracranial EEG monitoring. Clinical Neurophysiology 2016, 127: 2302-2307. PMID: 27072103, DOI: 10.1016/j.clinph.2016.02.018.Peer-Reviewed Original Research
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
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
2011
Proceedings of the Second International Workshop on Advances in Electrocorticography
Ritaccio A, Boatman-Reich D, Brunner P, Cervenka MC, Cole AJ, Crone N, Duckrow R, Korzeniewska A, Litt B, Miller KJ, Moran DW, Parvizi J, Viventi J, Williams J, Schalk G. Proceedings of the Second International Workshop on Advances in Electrocorticography. Epilepsy & Behavior 2011, 22: 641-650. PMID: 22036287, PMCID: PMC3847909, DOI: 10.1016/j.yebeh.2011.09.028.Chapters
2009
Concerning the observation of an electrical potential at a distance from an intracranial electrode contact
Zaveri HP, Duckrow RB, Spencer SS. Concerning the observation of an electrical potential at a distance from an intracranial electrode contact. Clinical Neurophysiology 2009, 120: 1873-1875. PMID: 19748311, DOI: 10.1016/j.clinph.2009.08.001.Commentaries, Editorials and LettersA 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 Research
2008
Interictal spikes on intracranial recording: Behavior, physiology, and implications
Spencer SS, Goncharova II, Duckrow RB, Novotny EJ, Zaveri HP. Interictal spikes on intracranial recording: Behavior, physiology, and implications. Epilepsia 2008, 49: 1881-1892. PMID: 18479398, DOI: 10.1111/j.1528-1167.2008.01641.x.Peer-Reviewed Original ResearchConceptsInterictal spikesAED withdrawalSeizure onsetSpike rateMedial temporal lobe seizuresAntiepileptic drug changesRefractory epileptic patientsTemporal lobe seizuresOnset seizuresDrug changesEpileptic patientsNeocortical locationsClinical meaningMedial temporalSeizuresIntracranial electrodesDays of recordingAED mechanismsIntracranial recordingsSignificant increaseAEDsPrevious reportsOnsetSpecific effectsWithdrawal
2006
On the use of bipolar montages for time-series analysis of intracranial electroencephalograms
Zaveri HP, Duckrow RB, Spencer SS. On the use of bipolar montages for time-series analysis of intracranial electroencephalograms. Clinical Neurophysiology 2006, 117: 2102-2108. PMID: 16887380, DOI: 10.1016/j.clinph.2006.05.032.Peer-Reviewed Original Research
2005
Coherence of the electroencephalogram during the first sleep cycle
Duckrow RB, Zaveri HP. Coherence of the electroencephalogram during the first sleep cycle. Clinical Neurophysiology 2005, 116: 1088-1095. PMID: 15826849, DOI: 10.1016/j.clinph.2004.12.002.Peer-Reviewed Original Research
1999
Stance perturbation-evoked potentials in old people with poor gait and balance
Duckrow RB, Abu-Hasaballah K, Whipple R, Wolfson L. Stance perturbation-evoked potentials in old people with poor gait and balance. Clinical Neurophysiology 1999, 110: 2026-2032. PMID: 10616107, DOI: 10.1016/s1388-2457(99)00195-9.Peer-Reviewed Original ResearchConceptsOlder subjectsOlder peopleStance perturbationsCortical potentialsYoung subjectsWeight-bearing platformRisk of fallsHealthy young subjectsCerebral cortical potentialsEarly positive peakSensory conductionSupraspinal centersPoor gaitFunctional capacityMotor responseMotor movementsNon-parametric testsForward translationSubjectsScalp potentialsNegative peakReduced mobilityInjuryFallMicroV
1990
Effect of hemodilution on regional cerebral blood flow during chronic hyperglycemia in rats.
Duckrow RB. Effect of hemodilution on regional cerebral blood flow during chronic hyperglycemia in rats. Stroke 1990, 21: 1072-1076. PMID: 2368109, DOI: 10.1161/01.str.21.7.1072.Peer-Reviewed Original ResearchConceptsRegional cerebral blood flowCerebral blood flowReduced regional cerebral blood flowAverage cerebral blood flowChronic hyperglycemiaBlood flowElevated hematocritBrain regionsCerebral blood flow decreasesRegional cerebral blood flow decreasesBlood flow decreaseEffect of hemodilutionIsovolemic hemodilutionRestrained ratsHyperglycemiaHemodilutionHematocritRatsFlow decreasesStreptozotocinDissection
1988
Regional cerebral blood flow and glucose utilization during hyperinsulinemia
Duckrow R. Regional cerebral blood flow and glucose utilization during hyperinsulinemia. Brain Research 1988, 462: 363-366. PMID: 3191397, DOI: 10.1016/0006-8993(88)90566-5.Peer-Reviewed Original ResearchGlucose transfer into rat brain during acute and chronic hyperglycemia
Duckrow R. Glucose transfer into rat brain during acute and chronic hyperglycemia. Metabolic Brain Disease 1988, 3: 201-209. PMID: 3221811, DOI: 10.1007/bf00999236.Peer-Reviewed Original ResearchConceptsPermeability-surface area productChronic hyperglycemiaBrain capillary permeability-surface area productBlood-brain barrierBrain glucose contentAcute hyperglycemiaGlucose transportIntraperitoneal injectionHyperglycemic ratsRestrained ratsRat brainHyperglycemiaCapillary permeability-surface area productGlucose transferRatsFacilitated glucose transportArea productBrain
1987
Regional Cerebral Glucose Utilization During Hyperglycemia
Duckrow R, Bryan R. Regional Cerebral Glucose Utilization During Hyperglycemia. Journal Of Neurochemistry 1987, 48: 989-993. PMID: 2949062, DOI: 10.1111/j.1471-4159.1987.tb05614.x.Peer-Reviewed Original ResearchConceptsRegional cerebral blood flowRegional cerebral glucose utilizationCerebral glucose utilizationChronic hyperglycemiaAcute hyperglycemiaGlucose utilizationCerebral blood flowCerebral metabolic rateMetabolic rateIntraperitoneal injectionRestrained ratsRCMRglBlood flowHyperglycemiaKetone bodiesOxidative metabolismBrainPrevious dataStreptozotocinDecreaseRatsWeeks