{"id":"https://openalex.org/W1970205195","doi":"https://doi.org/10.1109/embc.2013.6610993","title":"Circadian variation of scalp EEG: A novel measure based on wavelet packet transform and differential entropy","display_name":"Circadian variation of scalp EEG: A novel measure based on wavelet packet transform and differential entropy","publication_year":2013,"publication_date":"2013-07-01","ids":{"openalex":"https://openalex.org/W1970205195","doi":"https://doi.org/10.1109/embc.2013.6610993","mag":"1970205195","pmid":"https://pubmed.ncbi.nlm.nih.gov/24111180"},"language":"en","primary_location":{"id":"doi:10.1109/embc.2013.6610993","is_oa":false,"landing_page_url":"https://doi.org/10.1109/embc.2013.6610993","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref","pubmed"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5007947822","display_name":"Ali Shahidi Zandi","orcid":"https://orcid.org/0000-0002-3080-4603"},"institutions":[{"id":"https://openalex.org/I2799434747","display_name":"Douglas Mental Health University Institute","ror":"https://ror.org/05dk2r620","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I2799434747"]},{"id":"https://openalex.org/I5023651","display_name":"McGill University","ror":"https://ror.org/01pxwe438","country_code":"CA","type":"education","lineage":["https://openalex.org/I5023651"]}],"countries":["CA"],"is_corresponding":true,"raw_author_name":"Ali Shahidi Zandi","raw_affiliation_strings":["Treatment of Circadian Rhythms, Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QUE, Canada","Department of Psychiatry, McGill University , Montreal, QC, Canada"],"affiliations":[{"raw_affiliation_string":"Treatment of Circadian Rhythms, Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QUE, Canada","institution_ids":["https://openalex.org/I2799434747","https://openalex.org/I5023651"]},{"raw_affiliation_string":"Department of Psychiatry, McGill University , Montreal, QC, Canada","institution_ids":["https://openalex.org/I5023651"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5078435561","display_name":"Philippe Boudreau","orcid":"https://orcid.org/0000-0002-9367-2919"},"institutions":[{"id":"https://openalex.org/I2799434747","display_name":"Douglas Mental Health University Institute","ror":"https://ror.org/05dk2r620","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I2799434747"]},{"id":"https://openalex.org/I5023651","display_name":"McGill University","ror":"https://ror.org/01pxwe438","country_code":"CA","type":"education","lineage":["https://openalex.org/I5023651"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Philippe Boudreau","raw_affiliation_strings":["Treatment of Circadian Rhythms, Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QUE, Canada","Department of Psychiatry, McGill University , Montreal, QC, Canada"],"affiliations":[{"raw_affiliation_string":"Treatment of Circadian Rhythms, Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QUE, Canada","institution_ids":["https://openalex.org/I2799434747","https://openalex.org/I5023651"]},{"raw_affiliation_string":"Department of Psychiatry, McGill University , Montreal, QC, Canada","institution_ids":["https://openalex.org/I5023651"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5045617954","display_name":"Diane B. Boivin","orcid":"https://orcid.org/0000-0002-3896-2710"},"institutions":[{"id":"https://openalex.org/I2799434747","display_name":"Douglas Mental Health University Institute","ror":"https://ror.org/05dk2r620","country_code":"CA","type":"healthcare","lineage":["https://openalex.org/I2799434747"]},{"id":"https://openalex.org/I5023651","display_name":"McGill University","ror":"https://ror.org/01pxwe438","country_code":"CA","type":"education","lineage":["https://openalex.org/I5023651"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Diane B. Boivin","raw_affiliation_strings":["Treatment of Circadian Rhythms, Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QUE, Canada","Department of Psychiatry, McGill University , Montreal, QC, Canada"],"affiliations":[{"raw_affiliation_string":"Treatment of Circadian Rhythms, Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, QUE, Canada","institution_ids":["https://openalex.org/I2799434747","https://openalex.org/I5023651"]},{"raw_affiliation_string":"Department of Psychiatry, McGill University , Montreal, QC, Canada","institution_ids":["https://openalex.org/I5023651"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5055045540","display_name":"Guy A. Dumont","orcid":"https://orcid.org/0000-0003-2048-4391"},"institutions":[{"id":"https://openalex.org/I141945490","display_name":"University of British Columbia","ror":"https://ror.org/03rmrcq20","country_code":"CA","type":"education","lineage":["https://openalex.org/I141945490"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Guy A. Dumont","raw_affiliation_strings":["Department of Electrical & Computer Engineering, University of British Columbia, Vancouver, BC, Canada","Dept. of Electr. & Comput. Eng., Univ. of British Columbia., Vancouver, BC, Canada"],"affiliations":[{"raw_affiliation_string":"Department of Electrical & Computer Engineering, University of British Columbia, Vancouver, BC, Canada","institution_ids":["https://openalex.org/I141945490"]},{"raw_affiliation_string":"Dept. of Electr. & Comput. Eng., Univ. of British Columbia., Vancouver, BC, Canada","institution_ids":["https://openalex.org/I141945490"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5007947822"],"corresponding_institution_ids":["https://openalex.org/I2799434747","https://openalex.org/I5023651"],"apc_list":null,"apc_paid":null,"fwci":0.4559,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.61675742,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":96},"biblio":{"volume":"277","issue":null,"first_page":"6297","last_page":"6300"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10429","display_name":"EEG and Brain-Computer Interfaces","score":0.9968000054359436,"subfield":{"id":"https://openalex.org/subfields/2805","display_name":"Cognitive Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},"topics":[{"id":"https://openalex.org/T10429","display_name":"EEG and Brain-Computer Interfaces","score":0.9968000054359436,"subfield":{"id":"https://openalex.org/subfields/2805","display_name":"Cognitive Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10581","display_name":"Neural dynamics and brain function","score":0.9929999709129333,"subfield":{"id":"https://openalex.org/subfields/2805","display_name":"Cognitive Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10985","display_name":"Sleep and Wakefulness Research","score":0.9908000230789185,"subfield":{"id":"https://openalex.org/subfields/2805","display_name":"Cognitive Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/kurtosis","display_name":"Kurtosis","score":0.7237621545791626},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.5500262975692749},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.4888381361961365},{"id":"https://openalex.org/keywords/differential-entropy","display_name":"Differential entropy","score":0.4743971824645996},{"id":"https://openalex.org/keywords/entropy","display_name":"Entropy (arrow of time)","score":0.4515119194984436},{"id":"https://openalex.org/keywords/statistic","display_name":"Statistic","score":0.4254998564720154},{"id":"https://openalex.org/keywords/measure","display_name":"Measure (data warehouse)","score":0.4157909154891968},{"id":"https://openalex.org/keywords/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.38892465829849243},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.32386356592178345},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.28208842873573303},{"id":"https://openalex.org/keywords/joint-entropy","display_name":"Joint entropy","score":0.2644522190093994},{"id":"https://openalex.org/keywords/principle-of-maximum-entropy","display_name":"Principle of maximum entropy","score":0.2602776288986206},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.11302328109741211},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.10707399249076843}],"concepts":[{"id":"https://openalex.org/C166963901","wikidata":"https://www.wikidata.org/wiki/Q287251","display_name":"Kurtosis","level":2,"score":0.7237621545791626},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.5500262975692749},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.4888381361961365},{"id":"https://openalex.org/C124551494","wikidata":"https://www.wikidata.org/wiki/Q3055345","display_name":"Differential entropy","level":4,"score":0.4743971824645996},{"id":"https://openalex.org/C106301342","wikidata":"https://www.wikidata.org/wiki/Q4117933","display_name":"Entropy (arrow of time)","level":2,"score":0.4515119194984436},{"id":"https://openalex.org/C89128539","wikidata":"https://www.wikidata.org/wiki/Q1949963","display_name":"Statistic","level":2,"score":0.4254998564720154},{"id":"https://openalex.org/C2780009758","wikidata":"https://www.wikidata.org/wiki/Q6804172","display_name":"Measure (data warehouse)","level":2,"score":0.4157909154891968},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.38892465829849243},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.32386356592178345},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.28208842873573303},{"id":"https://openalex.org/C106752470","wikidata":"https://www.wikidata.org/wiki/Q1364826","display_name":"Joint entropy","level":3,"score":0.2644522190093994},{"id":"https://openalex.org/C9679016","wikidata":"https://www.wikidata.org/wiki/Q1417473","display_name":"Principle of maximum entropy","level":2,"score":0.2602776288986206},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.11302328109741211},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.10707399249076843},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[{"descriptor_ui":"D000204","descriptor_name":"Activity Cycles","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000204","descriptor_name":"Activity Cycles","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000204","descriptor_name":"Activity Cycles","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D001831","descriptor_name":"Body Temperature","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D001831","descriptor_name":"Body Temperature","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D001831","descriptor_name":"Body Temperature","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D002940","descriptor_name":"Circadian Rhythm","qualifier_ui":"Q000502","qualifier_name":"physiology","is_major_topic":false},{"descriptor_ui":"D002940","descriptor_name":"Circadian Rhythm","qualifier_ui":"Q000502","qualifier_name":"physiology","is_major_topic":false},{"descriptor_ui":"D002940","descriptor_name":"Circadian Rhythm","qualifier_ui":"Q000502","qualifier_name":"physiology","is_major_topic":false},{"descriptor_ui":"D004569","descriptor_name":"Electroencephalography","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D004569","descriptor_name":"Electroencephalography","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D004569","descriptor_name":"Electroencephalography","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D017286","descriptor_name":"Polysomnography","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D017286","descriptor_name":"Polysomnography","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D017286","descriptor_name":"Polysomnography","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D019277","descriptor_name":"Entropy","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D019277","descriptor_name":"Entropy","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D019277","descriptor_name":"Entropy","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D058067","descriptor_name":"Wavelet Analysis","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D058067","descriptor_name":"Wavelet Analysis","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D058067","descriptor_name":"Wavelet Analysis","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false}],"locations_count":2,"locations":[{"id":"doi:10.1109/embc.2013.6610993","is_oa":false,"landing_page_url":"https://doi.org/10.1109/embc.2013.6610993","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)","raw_type":"proceedings-article"},{"id":"pmid:24111180","is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/24111180","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Affordable and clean energy","id":"https://metadata.un.org/sdg/7","score":0.9100000262260437}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W87142834","https://openalex.org/W95736452","https://openalex.org/W1967708238","https://openalex.org/W1995945562","https://openalex.org/W1997860773","https://openalex.org/W2006163246","https://openalex.org/W2049425751","https://openalex.org/W2059951724","https://openalex.org/W2115755118","https://openalex.org/W2129309861","https://openalex.org/W2132968822","https://openalex.org/W2162067857","https://openalex.org/W2178223022","https://openalex.org/W2301525262","https://openalex.org/W4233014035","https://openalex.org/W4298982457","https://openalex.org/W6685991578"],"related_works":["https://openalex.org/W4297973239","https://openalex.org/W3012976800","https://openalex.org/W3149214146","https://openalex.org/W2005569032","https://openalex.org/W2071645312","https://openalex.org/W3129479059","https://openalex.org/W3017803079","https://openalex.org/W2019425375","https://openalex.org/W2543167752","https://openalex.org/W1501859017"],"abstract_inverted_index":{"We":[0],"propose":[1],"a":[2,35,65,68,117,129],"novel":[3],"entropy-based":[4,153],"measure":[5,33,106,127,154],"to":[6,122],"quantify":[7],"the":[8,50,54,75,85,95,102,123,125,144,152,173],"circadian":[9,32,103,131],"variations":[10],"of":[11,19,74,89,151,160,175],"scalp":[12],"electroencephalogram":[13],"(EEG)":[14],"by":[15],"analyzing":[16],"waking":[17,39],"epochs":[18],"nap":[20,36],"opportunities":[21],"under":[22],"an":[23],"ultradian":[24],"sleep-wake":[25],"cycle":[26],"(USW)":[27],"protocol.":[28],"To":[29],"compute":[30],"this":[31,90,176],"for":[34,53,134],"opportunity,":[37],"each":[38,80],"epoch":[40],"(~1":[41],"sec)":[42],"is":[43,61,82,92,99],"decomposed":[44],"using":[45,109],"wavelet":[46],"packet":[47],"transform":[48],"and":[49,94,136,168],"relative":[51,76],"energy":[52,77,166,170],"desired":[55],"frequency":[56],"band":[57],"(here,":[58],"10-12":[59],"Hz)":[60],"calculated.":[62],"Then,":[63],"in":[64],"bootstrapping":[66],"procedure,":[67],"shape":[69],"statistic":[70,91],"(skewness":[71],"or":[72],"kurtosis)":[73],"distribution,":[78],"after":[79],"resampling,":[81],"computed.":[83],"Finally,":[84],"probability":[86],"density":[87],"function":[88],"estimated,":[93],"corresponding":[96],"differential":[97],"entropy":[98],"considered":[100],"as":[101],"measure.":[104,177],"This":[105],"was":[107,155],"evaluated":[108],"EEG":[110],"recordings":[111],"from":[112],"4":[113],"healthy":[114],"subjects":[115],"during":[116],"72-h":[118],"USW":[119],"procedure.":[120],"According":[121],"results,":[124],"proposed":[126],"showed":[128],"significant":[130],"variation":[132],"both":[133],"individual":[135],"group":[137],"data,":[138],"with":[139,158],"peak":[140],"values":[141],"occurring":[142],"near":[143],"core":[145],"body":[146],"temperature":[147],"minimum.":[148],"The":[149],"performance":[150],"also":[156],"compared":[157],"that":[159],"two":[161],"other":[162],"measures,":[163],"namely":[164],"mean":[165,169],"logarithm":[167],"ratio,":[171],"revealing":[172],"superiority":[174]},"counts_by_year":[{"year":2017,"cited_by_count":2},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":2}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}