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dc.contributor.authorStrömmer, Juho
dc.date.accessioned2011-09-22T15:16:18Z
dc.date.available2011-09-22T15:16:18Z
dc.date.issued2011
dc.identifier.otheroai:jykdok.linneanet.fi:1184141
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/36713
dc.description.abstractThe study examined the brain’s automatic somatosensory change detection mechanism using event-related potentials (ERPs) to tactile electrical pulses to fingers in an oddball paradigm. Also the effects of aging to these ERPs were investigated comparing the data of young adults (N = 20, 22–27 years) with the data of aged participants (N = 12, 67–95 years). In the experiment, the participants were instructed to ignore finger stimuli and to be fully involved to a radio play during the electroencephalogram (EEG) recording. The electrical stimulation was delivered to participant’s forefinger and little finger in randomized order of standard (P = 0.85) and deviant (P = 0.15) stimuli. The analyzed components were P50 peak (30–80 ms), N80 peak (40–110 ms) and a positive deflection at the latency range of 150–200 ms (the mismatch response, MMR). The results revealed significantly different responses to standards than those to deviants in the young group, indicating the automatic detection of deviant stimuli analogically to mismatch negativity in the auditory and visual modalities. As hypotesized, the MMR was completely attenuated in the aged group. P50 and N80, instead, had prolonged latency in the aged group compared to young adults. The findings suggest that the somatosensory MMR is a good measure of change detection mechanism and age-related changes in it.
dc.format.extent27 sivua
dc.language.isoeng
dc.rightsThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.rightsJulkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.fi
dc.subject.othersomatosensory mismatch negativity (sMMN)
dc.subject.otheroddball paradigm
dc.titleSomatosensory change detection in the aging brain
dc.typeBooken
dc.identifier.urnURN:NBN:fi:jyu-2011092211433
dc.type.dcmitypeTexten
dc.type.ontasotPro gradufi
dc.type.ontasotMaster’s thesisen
dc.contributor.tiedekuntaYhteiskuntatieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Social Sciencesen
dc.contributor.laitosPsykologian laitosfi
dc.contributor.laitosDepartment of Psychologyen
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiainePsykologiafi
dc.contributor.oppiainePsychologyen
dc.date.updated2011-09-22T15:16:18Z
dc.rights.accesslevelopenAccessfi
dc.contributor.oppiainekoodi202
dc.subject.ysoikääntyminen
dc.subject.ysoaivot


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