2023
Decreased but diverse activity of cortical and thalamic neurons in consciousness-impairing rodent absence seizures
McCafferty C, Gruenbaum B, Tung R, Li J, Zheng X, Salvino P, Vincent P, Kratochvil Z, Ryu J, Khalaf A, Swift K, Akbari R, Islam W, Antwi P, Johnson E, Vitkovskiy P, Sampognaro J, Freedman I, Kundishora A, Depaulis A, David F, Crunelli V, Sanganahalli B, Herman P, Hyder F, Blumenfeld H. Decreased but diverse activity of cortical and thalamic neurons in consciousness-impairing rodent absence seizures. Nature Communications 2023, 14: 117. PMID: 36627270, PMCID: PMC9832004, DOI: 10.1038/s41467-022-35535-4.Peer-Reviewed Original ResearchConceptsThalamic neuronsAbsence seizuresSeizure onsetNeuronal firingConsciousness-impairing seizuresFemale rat modelLow-frequency electroencephalographic activityFunctional magnetic resonanceBehavioral arrestRat modelRhythmic firingTransient initial peakFiring increasesSeizuresNeuronal mechanismsElectroencephalographic activityNeuronsBrain state changesBrief episodesFiring decreasesInitial peakFiringMagnetic resonanceDistinct patternsOnset
2014
Physiological Basis of BOLD fMRI Decreases
Kim R, Hyder F, Blumenfeld H. Physiological Basis of BOLD fMRI Decreases. Neuromethods 2014, 88: 221-236. DOI: 10.1007/978-1-4939-0724-3_11.Peer-Reviewed Original ResearchCerebral blood flowCerebral blood volumeFMRI decreasesNeuronal activityLocal field potentialsNeuronal firingMagnetic resonance imaging (MRI) signal changesFunctional magnetic resonance imaging (fMRI) signal changesSpike-wave seizuresCortical slow oscillationsFMRI signal changesBOLD fMRI signalHippocampal seizuresSignal changesBasal gangliaDirect electrophysiological measurementsFMRI changesPhysiological basisSomatosensory stimulationBlood flowParadoxical decreaseAnimal modelsBlood volumeAnimal studiesCombined neuroimaging