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[{"key": "dc.contributor.advisor", "value": "Avela, Janne", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Parviainen, Tiina", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Piitulainen, Harri", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Nurminen, Mila", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2021-03-09T07:11:33Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2021-03-09T07:11:33Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2021", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/74536", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Kortikokinemaattisella koherenssilla (CKC) tarkoitetaan lineaarista riippuvuutta kinemaattisen signaalin (esim. nopeus tai kiihtyvyys) ja aivosignaalin v\u00e4lill\u00e4 (Bourguignon et al. 2011; Bourguignon et al. 2012; Piitulainen et al. 2013b). CKC:n oletetaan kuvastavan proprioseptisen signaalin prosessointia aivokuorella. Ensisijaisia afferentin signaalin l\u00e4hteit\u00e4 ovat lihasspindelit sek\u00e4 Golgin j\u00e4nne-elimet ja koherenssin huippuarvo paikantuu sensorimotoriselle (SM1) korteksille (Piitulainen et al. 2013b; Bourguignon et al. 2015.) Edelt\u00e4viss\u00e4 tutkimuksissa on osoitettu eroja CKC:n voimakkuudessa ik\u00e4ryhmien v\u00e4lill\u00e4 ja joissain keskushermoston sairauksissa sek\u00e4 korrelaatio tasapainon ja CKC:n voimakkuuden v\u00e4lill\u00e4 (Piitulainen et al. 2018b; Marty et al. 2019). Viitteit\u00e4 CKC:n eroista dominoivan ja ei-dominoivan raajan v\u00e4lill\u00e4 on my\u00f6s esitetty (Piitulainen et al. 2018b). Neuraaliset mekanismit ja koherenssin voimakkuuteen vaikuttavat sensorimotoriset hermoverkot on edelleen huonosti tunnettu. T\u00e4h\u00e4n p\u00e4iv\u00e4\u00e4n menness\u00e4 ei ole tiedossa, onko fysiologisen tilan muutoksella, kuten v\u00e4symyksell\u00e4 vaikutusta CKC:n voimakkuuteen ja voiko akuutti fyysinen urheiluharjoitus muokata sit\u00e4. Tutkimuksen tarkoituksena oli selvitt\u00e4\u00e4, vaikuttaako akuutti aerobinen juoksusuoritus CKC:n voimakkuuteen eli kortikaaliseen proprioseptiseen prosessointiin. Tutkimuksessa selvitettiin my\u00f6s, onko tasapaino yhteydess\u00e4 CKC:n voimakkuuteen, tai onko juoksuharjoituksen aiheuttamat muutokset tasapainossa tai CKC:ssa yhteydess\u00e4 toisiinsa. 10 tervett\u00e4 vapaaehtoista aikuista osallistui tutkimukseen, jossa mitattiin CKC:n voimakkuus ja tasapainokyky ennen 90 min juoksumattoharjoitusta ja sen j\u00e4lkeen. Koherenssia nilkan kiihtyvyyssignaalin ja SM1 alueen magnetoenkefalografia-signaalin (MEG) v\u00e4lill\u00e4 tarkasteltiin 2 Hz passiivisen nilkanliikutuksen aikana liiketaajuudella (F0) ja sen ensimm\u00e4isess\u00e4 harmoniassa (F1). Koherenssi m\u00e4\u00e4ritettiin arvona 0\u20131, jossa nolla tarkoittaa ei yhteytt\u00e4 ja yksi t\u00e4ydellist\u00e4 koherenssia signaalien v\u00e4lill\u00e4. Massakeskipisteen (COP) sijainninmuutoksen nopeutta mitattiin kahdella jalalla seisten tasapainolevyll\u00e4. Proprioseptiikan hy\u00f6dynt\u00e4mist\u00e4 tasapainossa arvioitiin laskemalla suhdeluku huojuntanopeuksille silm\u00e4t auki ja silm\u00e4t kiinni seisten (RQ). 90 min juoksuharjoituksen kuormittavuutta arvioitiin juoksun aikana laktaattin\u00e4ytteiden, syd\u00e4men sykkeen ja koetun kuormittuneisuuden asteikon avulla sek\u00e4 isometrisell\u00e4 maksimipolvenojennuksella ja suorin jaloin hyppelyll\u00e4 ennen juoksua ja sen j\u00e4lkeen. Hypoteesina oli, ett\u00e4 90 min aerobinen juoksuharjoitus heikent\u00e4isi proprioseptista prosessointia ja siten voimistaisi kortikokinemaattista koherenssia ja ett\u00e4 CKC:n voimakkuus olisi yhteydess\u00e4 tasapainokykyyn. Koherenssi MEG-signaalin ja kiihtyvyyssignaalin v\u00e4lill\u00e4 oli havaittavissa sek\u00e4 ennen juoksua ett\u00e4 sen j\u00e4lkeen F0 ja F1 taajuuksilla. Mahdollisesti eritt\u00e4in pienest\u00e4 otoskoosta johtuen (F0: n = 4 ja F1: n = 8) tai pitk\u00e4st\u00e4 aikav\u00e4list\u00e4 juoksun ja MEG-mittauksen v\u00e4lill\u00e4 (26 min) ei pystytty osoittamaan, ett\u00e4 akuutti juoksuharjoitus vaikuttaisi CKC:n voimakkuuteen. 90 min aerobisella juoksulla ei t\u00e4m\u00e4n tutkimuksen perusteella ole vaikutusta CKC:n voimakkuuteen F0 tai F1 taajuudella. Juoksu lis\u00e4si huojuntaa tasapainotestiss\u00e4, mutta ei vaikuttanut huojunnan m\u00e4\u00e4r\u00e4n suhteeseen silm\u00e4t kiinni ja silm\u00e4t auki testien v\u00e4lill\u00e4. Anterior-posterior-suuntainen huojunta silm\u00e4t kiinni oli yhteydess\u00e4 CKC:n voimakkuuteen F0 taajuudella, mutta muita yhteyksi\u00e4 tasapainon ja CKC:n v\u00e4lilt\u00e4 ei l\u00f6ytynyt. Johtuen pienest\u00e4 otoskoosta ja CKC-datan laatuongelmista, n\u00e4it\u00e4 tuloksia voidaan pit\u00e4\u00e4 vain suuntaa antavina.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Corticokinematic coherence (CKC) means linear dependence between kinematic signal (e.g. velocity or acceleration) and brain cortical signal (e.g. Bourguignon et al. 2011; Bourguignon et al. 2012; Piitulainen et al. 2013b). It is supposed, that CKC reflects cortical processing of proprioceptive feedback. CKC origins mainly from muscle spindles and Golgi tendon organs and peaks at contralateral SM1 cortex. (Piitulainen et al. 2013b; Bourguignon et al. 2015.) Previous studies have shown differences in the strength of CKC between age groups and with some central nervous system disorders, as well as association between postural balance and CKC (Piitulainen et al. 2018b; Marty et al. 2019). There are also some indications of the effect of limb dominance on CKC strength (Piitulainen et al. 2018b). Still, neural mechanisms of CKC and by which sensorimotor networks its strength is modulated are poorly understood. To date, it is unknown whether changes in physiological states, such as fatigue, affect the strength of CKC and whether CKC can be modulated by acute exercise. Purpose of this study was to investigate, does a single bout of aerobic running exercise have an effect on the strength of CKC, i.e. cortical proprioceptive processing. Secondary aim was to investigate if postural balance is correlated with the strength of CKC or if changes in these parameters due to running exercise associated with each other. Ten healthy volunteer adults participated in the study, where CKC and postural sway was measured before and after 90 min treadmill running. Coherence between magnetoencephalography (MEG) signal in SM1 at movement frequency (F0) and its first harmonic (F1) and acceleration signal during passive 2 Hz ankle movement was evaluated in scale 0\u20131, where zero is no association and one is perfect coherence. Velocity of center of pressure (COP) displacement was measured during two feet standing on balancing board. Use of proprioception during standing was determined by calculating quotient between eyes open and eyes closed standing (RQ). For evaluation of 90 min running exercise, blood lactate levels, heart rate and rating of perceived exertion was monitored during running and maximal isometric contraction of knee extensors and straight-legged jumps was performed before and after running. Hypothesis was that 90 min running would impair proprioceptive processing and thus increase CKC and that CKC is connected to balance control.\nSignificant coherence between MEG and acceleration signal was observed before and after running at F0 and at F1. Possibly due to extremely small sample size (n = 4 at F0 and n = 8 at F1) or time between running and CKC measurement (26 min) this study could not show that acute running exercise would alter the strength of CKC. Results from this study suggest that 90 minutes moderate intensity aerobic running exercise has no effect on corticokinematic coherence at F0 or at F1. Moreover, running exercise disturbed postural balance control when standing on two feet eyes closed and eyes open, but did not have effect on quotient between eyes closed and eyes open sway. Only antero-posterior sway during eyes closed standing correlated with the strength of CKC at F0, but further evidence about associations between the strength of CKC and postural balance was not found. Because of small sample size and problems in CKC data quality, these results must be considered only preliminary.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2021-03-09T07:11:33Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2021-03-09T07:11:33Z (GMT). No. of bitstreams: 0\n Previous issue date: 2021", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "114", "language": "", "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": "corticokinematic coherence", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "propriocetion", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "running exercise", "language": "", "element": 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