Search results for "Phase lag"

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Functional connectivity of major depression disorder using ongoing EEG during music perception

2020

Abstract Objective The functional connectivity (FC) of major depression disorder (MDD) has not been well studied under naturalistic and continuous stimuli conditions. In this study, we investigated the frequency-specific FC of MDD patients exposed to conditions of music perception using ongoing electroencephalogram (EEG). Methods First, we applied the phase lag index (PLI) method to calculate the connectivity matrices and graph theory-based methods to measure the topology of brain networks across different frequency bands. Then, classification methods were adopted to identify the most discriminate frequency band for the diagnosis of MDD. Results During music perception, MDD patients exhibit…

Adultmasennusmedicine.medical_specialtymusic perceptionFrequency bandmusiikkiElectroencephalographyAudiologybehavioral disciplines and activitiesnaturalistic stimuli050105 experimental psychology03 medical and health sciencesBeta bandYoung Adult0302 clinical medicinePhysiology (medical)mental disordersmedicineHumans0501 psychology and cognitive sciencesEEGDepression (differential diagnoses)AgedDepressive Disorder Majormedicine.diagnostic_testFunctional connectivity05 social sciencesfunctional connectivitymajor depression disorderBrainElectroencephalographyMiddle AgedSensory SystemsPhase lagongoing EEGNeurologyMusic perceptionAuditory PerceptionClassification methodsNeurology (clinical)Psychology030217 neurology & neurosurgeryMusicärsykkeet
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Sustaining Attention for a Prolonged Duration Affects Dynamic Organizations of Frequency-Specific Functional Connectivity

2020

Sustained attention encompasses a cascade of fundamental functions. The human ability to implement a sustained attention task is supported by brain networks that dynamically formed and dissolved through oscillatory synchronization. The decrement of vigilance induced by prolonged task engagement affects sustained attention. However, little is known about which stage or combinations are affected by vigilance decrement. Here, we applied an analysis framework composed of weighted phase lag index (wPLI) and tensor component analysis (TCA) to an EEG dataset collected during 80 min sustained attention task to examine the electrophysiological basis of such effect. We aimed to characterize the phase…

vigilance decrementmedia_common.quotation_subjecttensor component analysisWeighted phase lag indexElectroencephalographybehavioral disciplines and activitiesFrequency-specific dynamic functional connectivitySustaining attentionRewardmotivationmedicineHumansRadiology Nuclear Medicine and imagingAttentionWakefulnesstarkkaavaisuusmedia_commonmotivaatioOriginal PaperMotivationRadiological and Ultrasound Technologymedicine.diagnostic_testsignaalinkäsittelyFunctional connectivityBrainsignaalianalyysiTask engagementSustained attentionPhase lagElectrophysiological PhenomenaElectrophysiologysustained attentionNeurologyTensor component analysisSensorimotor networkVigilance decrementweighted phase lag indexfrequency-specific dynamic functional connectivityNeurology (clinical)kognitiivinen neurotiedeAnatomyPsychologyNeuroscienceVigilance (psychology)
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