Resting GABA and glutamate concentrations do not predict visual gamma frequency or amplitude
Cousijn H, Haegens S, Wallis G, Near J, Stokes M, Harrison P, Nobre A. Resting GABA and glutamate concentrations do not predict visual gamma frequency or amplitude. Proceedings Of The National Academy Of Sciences Of The United States Of America 2014, 111: 9301-9306. PMID: 24927588, PMCID: PMC4078853, DOI: 10.1073/pnas.1321072111.Peer-Reviewed Original ResearchConceptsGamma peak frequencyHealthy volunteersGamma oscillationsVisual gamma activityBeamformer spatial filtering techniquesPeak frequencyCortical gamma oscillationsMagnetic resonance spectroscopyExcitatory pyramidal cellsGamma activityGamma-band oscillationsMagnetic resonance spectroscopy voxelGABAergic interneuronsMagnetic resonance spectroscopy measurementsGaussian fittingPyramidal cellsMagnetic resonance spectroscopy dataGABA levelsGamma frequenciesGABA concentrationsMeasurement of GABAGABAGlutamate concentrationOscillationsOccipital lobeInter- and intra-individual variability in alpha peak frequency
Haegens S, Cousijn H, Wallis G, Harrison P, Nobre A. Inter- and intra-individual variability in alpha peak frequency. NeuroImage 2014, 92: 46-55. PMID: 24508648, PMCID: PMC4013551, DOI: 10.1016/j.neuroimage.2014.01.049.Peer-Reviewed Original ResearchConceptsAlpha peak frequencyAlpha rhythmVisual stimulation conditionsN-back working memory paradigmHealthy human subjectsBeta peak frequencyWorking memory paradigmN-back paradigmN-back taskBetween-subject SDIncreased cognitive demandsAlpha frequency bandPassive visual stimulationPeak frequencyElectrophysiological evidenceIntra-individual variabilityMemory paradigmParietal cortexCognitive processesBrain activityPosterior regionCognitive demandsAlpha activityStimulation conditionsOccipital sources
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