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[{"key": "dc.contributor.advisor", "value": "Kujala, Jan", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Heino, Oona", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Vocheva, Alevtina", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2025-06-23T07:07:32Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2025-06-23T07:07:32Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2025", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/103841", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Ty\u00f6muisti on yksi perustavanlaatuisista kognitiivisista aivotoiminnoista. Yksi ty\u00f6muisti-prosessin kolmesta vaiheesta on mieleenpalautus, jolla tarkoitetaan aktiivista jo tallennetun tiedon hakemista takaisin k\u00e4sittelyyn. Tutkimusn\u00e4ytt\u00f6 viittaa erityisesti etuotsalohkon alueiden aktivaatioon mieleenpalautusvaiheessa. Sen aikaisen aivoaktivaation ja reaktioajan yhteyden tarkasteleminen lyhyill\u00e4 ja tehokkailla koeasetelmilla tarjoaa ty\u00f6muistin toimin-nasta t\u00e4rke\u00e4\u00e4 tietoa, jota voidaan mahdollisesti hy\u00f6dynt\u00e4\u00e4 niin tutkimuksessa kuin tulevaisuuden kliinisess\u00e4 kontekstissa. \nT\u00e4ss\u00e4 tutkimuksessa tarkastellaan Sternberg-teht\u00e4v\u00e4n aikaista etuotsalohkon akti-vaatiota ja suhteutetaan sit\u00e4 vastaamiseen k\u00e4ytettyyn aikaan. Tutkittavia (N=22) mitattiin magnetoenkefalografiamenetelm\u00e4ll\u00e4 (MEG) heid\u00e4n suorittaessaan teht\u00e4v\u00e4\u00e4, jossa heid\u00e4n tuli painaa mieleens\u00e4 2- ja 4-numeroisia numerosarjoja. T\u00e4m\u00e4n j\u00e4lkeen ruudulle ilmestyi yksitt\u00e4inen numero\u00e4rsyke, ja tarkoituksena oli muistaa, esiintyik\u00f6 se \u00e4sken n\u00e4hdyss\u00e4 sarjassa vai ei. Analyysivaiheessa vertailtiin nopeasti ja hitaasti annettujen vastausten yhteydess\u00e4 mitattuja aivovasteita eri teht\u00e4v\u00e4toisinnoista. \nTulokset osoittavat, ett\u00e4 pitkien numerosarjojen prosessointiin kului lyhyit\u00e4 sarjoja enemm\u00e4n aikaa. Muistitietoa vastaavia \u00e4rsykkeit\u00e4 puolestaan k\u00e4siteltiin nopeammin kuin niit\u00e4, jotka eiv\u00e4t esiintyneet mieleen painetussa numerosarjassa (ei-vastaavat). Nopeasti ja hitaasti annettuja vastauksia vertaillessa havaittiin tilastollisesti merkitsev\u00e4 ero pitkien vastaavien ja lyhyiden ei-vastaavien kohdalla kaikilla tarkastelluilla aivoalueilla. Tulosten valossa ty\u00f6muistin kompleksista rakennetta voidaan onnistuneesti tutkia yhdist\u00e4m\u00e4ll\u00e4 hermostollista ja behavioraalista tietoa.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Working memory is one of the fundamental cognitive functions. One of the three phases of the working memory process is retrieval, which means actively bringing previously encoded information back into the processing stage. Research evidence indicates activation of the frontal lobes in particular during the retrieval phase. Examining the relationship between neural activity and reaction times using short and efficient experimental designs offers important insights into the function of working memory. These insights can be applied in fu-ture research and clinical contexts. \nIn this study, neural activity in the frontal lobe during Sternberg task is examined and compared with the reaction times. The participants (N=22) were measured using magnetoencephalography (MEG) while they were performing a task in which they were asked to memorise number sequences of two and four digits. After this, a single probe digit appeared on the screen, and the participants were supposed to recall whether it had been present in the previously shown number sequence or not. While analysing, the brain activity connected to fast and slow responses were compared with each other in different task conditions. \nThe results demonstrate that processing long number sequences took longer compared to the short ones. In turn, the stimuli that matched the memory content were processed faster than those that did not. Comparing the fast and slow responses, statistically significant differences were detected in the long match and short non-match conditions in all observed brain areas. In light of these results, it can be stated that the complex nature of working memory can successfully be studied by combining neural and behavioural data.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2025-06-23T07:07:32Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2025-06-23T07:07:32Z (GMT). No. of bitstreams: 0\n Previous issue date: 2025", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "31", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "mieleenpalautus", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "magnetoenkefalografia (MEG)", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "reaktioaika", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "Sternberg-teht\u00e4v\u00e4", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Etuotsalohkon toiminnan ja reaktioajan yhteyden tutkiminen MEG-menetelm\u00e4ll\u00e4 ty\u00f6muistin mieleenpalautusvaiheessa", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202506235613", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Kasvatustieteiden ja psykologian tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Education and Psychology", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Psykologian laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Psychology", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": null, "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": null, "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Psykologia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Psychology", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.copyright", "value": "\u00a9 The Author(s)", "language": "fi", "element": "rights", "qualifier": "copyright", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.yso", "value": "MEG", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "muisti (kognitio)", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "aivot", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ty\u00f6muisti", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "neuropsykologia", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
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