Older adults show elevated intermuscular coherence in eyes-open standing but only young adults increase coherence in response to closing the eyes

Simple item page
dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorWalker, S.en_US
dc.contributor.authorPiitulainen, H.en_US
dc.contributor.authorManlangit, T.en_US
dc.contributor.authorAvela, J.en_US
dc.contributor.authorBaker, S. N.en_US
dc.contributor.departmentDepartment of Neuroscience and Biomedical Engineeringen
dc.date.accessioned2020-06-25T08:39:25Z
dc.date.available2020-06-25T08:39:25Z
dc.date.issued2020-06en_US
dc.description.abstractNew Findings: What is the central question of this study? Can a 14-week strength-training programme modify intermuscular coherence levels during bipedal standing tasks with eyes open and eyes closed and reduce age-related differences? What is the main finding and its importance? Older adults had more prominent common input over 4–14 Hz with eyes open, but during the eyes-closed task the young adults were able to further enhance their common input at 6–36 Hz. This indicates that young adults are better at modulating common input in different motor tasks. Abstract: Understanding neural control of standing balance is important to identify age-related degeneration and design interventions to maintain function. Here, intermuscular coherence between antagonist muscle pairs around the ankle-joint during standing balance tasks was investigated before and after strength training. Ten young (18–31 years; YOUNG) and nine older adults (66–73 years; OLDER) stood on a force plate for 120 s with eyes open followed by 120 s with eyes closed before and after 14 weeks of strength training. Postural sway was quantified from centre-of-pressure displacement based on 3-D force moments. Electromyography (EMG) was recorded from the gastrocnemius medialis (GM), soleus (SOL) and tibilais anterior (TA) muscles of the right leg. Coherence between rectified EMG pairs (GM–TA, SOL–TA) was calculated for each 120 s epoch separately. Postural sway was lower in YOUNG compared to OLDER in eyes-open (6.8 ± 1.3 vs. 10.3 ± 4.7 mm s −1, P = 0.028) and eyes-closed (10.9 ± 3.1 vs. 24.4 ± 18.3 mm s −1, P = 0.032) tasks. For both muscle pairs, OLDER had more prominent common input over 4–14 Hz with eyes open, but when the proprioceptive demand was enhanced in the eyes-closed task the YOUNG were able to further enhance their common input at 6–36 Hz (P < 0.05). Strength training reduced the instability from closing the eyes in OLDER but did not alter coherence. This may highlight a greater functional reserve in YOUNG than in OLDER and possible emerging proprioceptive degeneration in OLDER. However, the findings question the functional role of coherence for balance.en
dc.description.versionPeer revieweden
dc.format.extent12
dc.format.extent1000-1011
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationWalker, S, Piitulainen, H, Manlangit, T, Avela, J & Baker, S N 2020, ' Older adults show elevated intermuscular coherence in eyes-open standing but only young adults increase coherence in response to closing the eyes ', EXPERIMENTAL PHYSIOLOGY, vol. 105, no. 6, pp. 1000-1011 . https://doi.org/10.1113/EP088468en
dc.identifier.doi10.1113/EP088468en_US
dc.identifier.issn0958-0670
dc.identifier.otherPURE UUID: 6e6abec2-96db-4626-81c8-fb2530cbfe5cen_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/6e6abec2-96db-4626-81c8-fb2530cbfe5cen_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85085088455&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/43308037/Walker_Older_adults.EP088468_4.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/45153
dc.identifier.urnURN:NBN:fi:aalto-202006254110
dc.language.isoenen
dc.publisherWILEY-BLACKWELL
dc.relation.ispartofseriesEXPERIMENTAL PHYSIOLOGYen
dc.relation.ispartofseriesVolume 105, issue 6en
dc.rightsopenAccessen
dc.subject.keywordageingen_US
dc.subject.keywordcorticomuscularen_US
dc.subject.keywordcorticospinal couplingen_US
dc.subject.keywordinterventionen_US
dc.subject.keywordmotor controlen_US
dc.subject.keywordstrength trainingen_US
dc.subject.keywordMONKEY MOTOR CORTEXen_US
dc.subject.keywordPOSTURAL CONTROLen_US
dc.subject.keywordMULTIMUSCLE CONTROLen_US
dc.subject.keywordVISUAL INFORMATIONen_US
dc.subject.keywordTASKen_US
dc.subject.keywordSTRENGTHen_US
dc.subject.keywordSYNCHRONIZATIONen_US
dc.subject.keywordOSCILLATIONSen_US
dc.subject.keywordCOMMUNITYen_US
dc.subject.keywordBALANCEen_US
dc.titleOlder adults show elevated intermuscular coherence in eyes-open standing but only young adults increase coherence in response to closing the eyesen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
Files
Collections
[article-cris] Perustieteiden korkeakoulu / SCI