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[{"key": "dc.contributor.advisor", "value": "Parviainen, Tiina", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "M\u00e4kel\u00e4, Noora", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2015-12-31T11:48:31Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2015-12-31T11:48:31Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2015", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1506477", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/48214", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Kuuloaivokuoren \u00e4rsykkeisiin liittyvien neuraalisten oskillaatioiden kehityst\u00e4 ihmisell\u00e4 ei viel\u00e4 t\u00e4ysin tunneta. T\u00e4m\u00e4n tutkimuksen tavoitteena on kuvata auditorisen prosessoinnin kehityst\u00e4 induced-aktivaation ja phase-locking-arvon avulla. Koehenkil\u00f6t olivat 6\u201313,5-vuotiailta lapsia (N=36) sek\u00e4 aikuisia (N=11). Koko p\u00e4\u00e4n kattavaa magnetoenkefalografiaa (MEG) k\u00e4ytettiin nauhoittamaan aivokuoren aktivaatiota passiivisen kuuntelun teht\u00e4v\u00e4n aikana. Osallistujille esitettiin yksinkertaisia sini\u00e4\u00e4ni\u00e4 (1000 Hz, kesto 50 ms) \u00e4rsykkeen\u00e4 erikseen molempiin korviin. Induced-aktivaatiosta ja phase-locking-arvosta laskettiin aika-taajuuskuvat (time-frequency representation) sek\u00e4 vasemman ett\u00e4 oikean hemisf\u00e4\u00e4rin aktivaation mukaan k\u00e4ytt\u00e4m\u00e4ll\u00e4 Morlet wavelet -muunnosta. Tarkempaa tutkimista varten aktivaation maksimin voimakkuus laskettiin aika-taajuuskuvan avulla. \n\nTulokset osoittivat merkitt\u00e4vi\u00e4 eroja lasten ja aikuisten rytmisen induced-aktivaation ja phase-locking-arvon v\u00e4lill\u00e4. Aikuisilla havaittiin voimakkaampi vaste induced-aktivaatiossa ja varhaisemmat latenssit kuin lapsilla. Lis\u00e4ksi aikuisilla oli lapsiin verrattuna n\u00e4ht\u00e4viss\u00e4 voimakkaampi ja aikaisempi phase-locking-arvo. Tuloksissa ei havaittu eroja eri-ik\u00e4isten lapsiryhmien v\u00e4lill\u00e4. Kontralateraaliseen korvaan esitetty \u00e4rsyke aiheutti voimakkaamman, aikaisemman ja taajuudeltaan matalamman induced-aktivaation sek\u00e4 voimakkaamman phase-locking-arvon kuin ipsilateraalinen \u00e4rsyke. Kontralateraalinen dominanssi oli havaittavissa jokaisessa ik\u00e4luokassa ja se n\u00e4kyi ainoastaan oikeassa hemisf\u00e4\u00e4riss\u00e4.\n\nL\u00f6yd\u00f6kset osoittavat kuulotiedon k\u00e4sittelyyn liittyv\u00e4n rytmisen aktivaation kehityksen olevan keskener\u00e4ist\u00e4 viel\u00e4 13 vuoden i\u00e4ss\u00e4. Tulokset viittaavat siihen, ett\u00e4 kontralateraalinen preferenssi on kehittynyt ainakin 6-vuotiailla lapsilla ja ett\u00e4 neuraalisten oskillaatioiden kehittymismekanismissa on eroja vasemman ja oikean hemisf\u00e4\u00e4rin v\u00e4lill\u00e4. Tulokset antavat viitteit\u00e4 siit\u00e4, ett\u00e4 induced-aktivaation avulla voidaan luonnehtia auditorisen prosessoinnin kypsymisen erilaisia kehityskaaria, jotka todenn\u00e4k\u00f6isesti heijastavat ik\u00e4\u00e4n liittyvi\u00e4 eroavaisuuksia auditorisessa prosessoinnissa. N\u00e4m\u00e4 tulokset tarjoavat pohjan tulevaisuuden tutkimuksille.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Maturational trajectory of stimulus-evoked changes in neural oscillation is still quite unknown in humans. The purpose of this study was to describe maturational changes of auditory processing in induced activation power and phase-locking values. The subjects were children between the age of 6 and 13 years (N=36) and adults (N=11). In this thesis, whole-head magnetoencephalography (MEG) were used to record cortical auditory activation during passive listening. The pure tones stimuli (1000 Hz, 50 ms duration) were monoaurally presented to both ears. Time-frequency analyses were applied using Morlet wavelet transform to stimulus induced power and phase-locking values from the left and the right auditory cortices. For closer examination, measures of the maximum activation were calculated from time-frequency representations. \n\nThe results revealed significant differences in rhythmic induced activity and inter-trial phase-locking between children and adults. Adults showed stronger induced power and earlier latencies than children. Also, adults had stronger phase-locking across trials and earlier timing of the maximum phase-locking than those in children. Changes between children in different age groups were not observed. Contralateral ear stimulation evoked stronger, earlier and lower frequency induced responses and also stronger phase-locking than ipsilateral ear stimulation. Further, contralateral dominance was observed in all age groups and only in the right hemisphere.\n\nThe findings indicate that the maturation of induced activation is not complete before the age of 13 years. Moreover, results imply that contralateral preference has developed in children at least by the age of 6, and suggest hemispheric differences in neural oscillatory maturation mechanism. The current data proposes that the temporal and spectral induced activation profiles might characterize different developmental trajectories, possibly reflecting age-related differences in neural auditory processing and providing a basis for further examination.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Noora M\u00e4kel\u00e4 (nohemake) on 2015-12-31 11:48:31.121539. Form: Pro gradu -lomake (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake). JyX data: [jyx_publishing-allowed (fi) =True]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija.group@korppi.jyu.fi) on 2015-12-31T11:48:31Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201512314150.pdf: 2287374 bytes, checksum: 53a849f81ef75673baa0481d19356baa (MD5)\nlicense.html: 4831 bytes, checksum: b49306b106099d4a5a56a8c49e8ff004 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2015-12-31T11:48:31Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201512314150.pdf: 2287374 bytes, checksum: 53a849f81ef75673baa0481d19356baa (MD5)\nlicense.html: 4831 bytes, checksum: b49306b106099d4a5a56a8c49e8ff004 (MD5)\n Previous issue date: 2015", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (40 sivua)", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "kuuloaivokuori", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "oskillaatiot", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "MEG induced activation measures in describing auditory cortex maturation", "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-201512314150", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Yhteiskuntatieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Social Sciences", "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": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "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.date.updated", "value": "2015-12-31T11:48:32Z", "language": null, "element": "date", "qualifier": "updated", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": null, "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": "fi", "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "202", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kehitys", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "MEG", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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