{"doi":"10.3791/60120","title":"Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography","abstract":null,"journal":"Journal of Visualized Experiments","year":2019,"id":633256,"datarank":0.29188652235829704,"base_score":1.9459101490553132,"endowment":1.9459101490553132,"self_citation_contribution":0.29188652235829704,"citation_network_contribution":0.0,"self_endowment_contribution":0.29188652235829704,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":6,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1641744,"name":"Marco Fuscà","orcid":null,"position":1,"is_corresponding":false},{"id":1641745,"name":"Nathan Weisz","orcid":null,"position":2,"is_corresponding":false},{"id":1641746,"name":"Gianpaolo Demarchi","orcid":null,"position":3,"is_corresponding":false},{"id":1040286,"name":"Elie Rassi","orcid":"0000-0003-1927-5373","position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography","abstract":"Pre-stimulus oscillatory brain activity influences upcoming perception. The characteristics of this pre-stimulus activity can predict whether a near-threshold stimulus will be perceived or not perceived, but can they also predict which one of two competing stimuli with different perceptual contents is perceived? Ambiguous visual stimuli, which can be seen in one of two possible ways at a time, are ideally suited to investigate this question. Magnetoencephalography (MEG) is a neurophysiological measurement technique that records magnetic signals emitted as a result of brain activity. The millisecond temporal resolution of MEG allows for a characterization of oscillatory brain states from as little as 1 second of recorded data. Presenting an empty screen around 1 second prior to the ambiguous stimulus onset therefore provides a time window in which one can investigate whether pre-stimulus oscillatory activity biases the content of upcoming perception, as indicated by participants' reports. The spatial resolution of MEG is not excellent, but sufficient to localise sources of brain activity at the centimetre scale. Source reconstruction of MEG activity then allows for testing hypotheses about the oscillatory activity of specific regions of interest, as well as the time- and frequency-resolved connectivity between regions of interest. The described protocol enables a better understanding of the influence of spontaneous, ongoing brain activity on visual perception.","is_dataset_classified":null,"base_score":1.9459101490553132,"endowment":1.9459101490553132,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"31403630","pmcid":null,"openalex_id":"https://openalex.org/W2964838174","authors":[],"funders":[{"funder_name":"Austrian Science Fund FWF","grant_id":"W 1233","title":null},{"funder_name":"European Commission","grant_id":"283404","title":"Brain-State Dependent Perception: Finding the Windows to Consciousness"}],"total_grants":2,"fwci":0.4241,"citation_percentile":0.58807849,"influential_citations":0,"citation_trend":[{"year":2021,"count":1},{"year":2022,"count":3},{"year":2023,"count":1},{"year":2025,"count":1}],"oa_status":"closed","license":"CC BY","oa_locations":[{"url":"https://www.jove.com/t/60120/detecting-pre-stimulus-source-level-effects-on-object-perception-with","host_type":"publisher"},{"url":"https://doi.org/10.3791/60120","host_type":"journal"},{"url":"https://pubmed.ncbi.nlm.nih.gov/31403630","host_type":"repository"},{"url":"https://doi.org/10.3791/60120-v","host_type":""},{"url":"https://www.jove.com/pdf/60120/detecting-pre-stimulus-source-level-effects-on-object-perception-with","host_type":""},{"url":"https://dx.doi.org/10.3791/60120","host_type":""},{"url":"https://resolver.obvsg.at/urn:nbn:at:at-ubs:3-13841","host_type":""},{"url":"https://eplus.uni-salzburg.at/id/4347283","host_type":""}],"fields_of_study":["Neural dynamics and brain function","EEG and Brain-Computer Interfaces","Functional Brain Connectivity Studies","Biology","Medicine","Psychology","03 medical and health sciences","0302 clinical medicine","05 social sciences","0501 psychology and cognitive sciences","Brain","Brain Mapping","Humans","Magnetoencephalography","Sensory Thresholds","Visual Perception"],"mesh_terms":["Brain","Brain Mapping","Humans","Sensory Thresholds","Visual Perception","Magnetoencephalography"],"keywords":["Magnetoencephalography","Stimulus (psychology)","Perception","Brain activity and meditation","Psychology","Neurophysiology","Neuroscience","Visual Objects","Visual perception","Electroencephalography","Computer science","Communication","Cognitive psychology","Brain Mapping","Sensory Thresholds","Brain","Humans"],"sdg_mappings":[{"sdg_number":3,"sdg_label":"3. 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