Older adults use a motor plan that is detrimental to endpoint control

Abstract Here, we aimed to understand if older adults (OA) use a unique motor plan that is detrimental to endpoint control. We performed two experiments that used ankle ballistic contractions that reversed at the target. In Experiment 1, eight young adults (YA; 27.1 ± 4.2) and eight OA (73.3 ± 4.5)...

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Autores principales:	Stefan Delmas, Yoon Jin Choi, Marcel Komer, Michelle Weintraub, Basma Yacoubi, Evangelos A. Christou
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b5cc87810bdd4ddc8258ecbecfadd93c
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spelling	oai:doaj.org-article:b5cc87810bdd4ddc8258ecbecfadd93c2021-12-02T14:17:16ZOlder adults use a motor plan that is detrimental to endpoint control10.1038/s41598-021-86959-92045-2322https://doaj.org/article/b5cc87810bdd4ddc8258ecbecfadd93c2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86959-9https://doaj.org/toc/2045-2322Abstract Here, we aimed to understand if older adults (OA) use a unique motor plan that is detrimental to endpoint control. We performed two experiments that used ankle ballistic contractions that reversed at the target. In Experiment 1, eight young adults (YA; 27.1 ± 4.2) and eight OA (73.3 ± 4.5) aimed to perform an ankle dorsiflexion–plantarflexion movement that reversed at 9° in 180 ms (target). We found that the coordination pattern (motor plan) differed for the two groups. OA used significantly greater soleus (SOL) activity to reverse the ankle movement than YA and exhibited greater tibialis anterior (TA) muscle activity variability (p < 0.05). OA exhibited worse endpoint control than YA, which associated with the exacerbated TA variability (R2 > 0.2; p < 0.01). Experiment 2 aimed to confirm that the OA motor plan was detrimental to endpoint control. Fifteen YA (20.5 ± 1.4) performed an ankle dorsiflexion–plantarflexion contraction that reversed at 30% MVC in 160 ms by using either a pattern that mimicked OA (High SOL) or YA (Low SOL). With the High SOL coordination pattern, YA exhibited impaired endpoint control and greater TA activation variability. These findings provide strong evidence that OA select a unique motor plan that is detrimental to endpoint control.Stefan DelmasYoon Jin ChoiMarcel KomerMichelle WeintraubBasma YacoubiEvangelos A. ChristouNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Stefan Delmas Yoon Jin Choi Marcel Komer Michelle Weintraub Basma Yacoubi Evangelos A. Christou Older adults use a motor plan that is detrimental to endpoint control
description	Abstract Here, we aimed to understand if older adults (OA) use a unique motor plan that is detrimental to endpoint control. We performed two experiments that used ankle ballistic contractions that reversed at the target. In Experiment 1, eight young adults (YA; 27.1 ± 4.2) and eight OA (73.3 ± 4.5) aimed to perform an ankle dorsiflexion–plantarflexion movement that reversed at 9° in 180 ms (target). We found that the coordination pattern (motor plan) differed for the two groups. OA used significantly greater soleus (SOL) activity to reverse the ankle movement than YA and exhibited greater tibialis anterior (TA) muscle activity variability (p < 0.05). OA exhibited worse endpoint control than YA, which associated with the exacerbated TA variability (R2 > 0.2; p < 0.01). Experiment 2 aimed to confirm that the OA motor plan was detrimental to endpoint control. Fifteen YA (20.5 ± 1.4) performed an ankle dorsiflexion–plantarflexion contraction that reversed at 30% MVC in 160 ms by using either a pattern that mimicked OA (High SOL) or YA (Low SOL). With the High SOL coordination pattern, YA exhibited impaired endpoint control and greater TA activation variability. These findings provide strong evidence that OA select a unique motor plan that is detrimental to endpoint control.
format	article
author	Stefan Delmas Yoon Jin Choi Marcel Komer Michelle Weintraub Basma Yacoubi Evangelos A. Christou
author_facet	Stefan Delmas Yoon Jin Choi Marcel Komer Michelle Weintraub Basma Yacoubi Evangelos A. Christou
author_sort	Stefan Delmas
title	Older adults use a motor plan that is detrimental to endpoint control
title_short	Older adults use a motor plan that is detrimental to endpoint control
title_full	Older adults use a motor plan that is detrimental to endpoint control
title_fullStr	Older adults use a motor plan that is detrimental to endpoint control
title_full_unstemmed	Older adults use a motor plan that is detrimental to endpoint control
title_sort	older adults use a motor plan that is detrimental to endpoint control
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b5cc87810bdd4ddc8258ecbecfadd93c
work_keys_str_mv	AT stefandelmas olderadultsuseamotorplanthatisdetrimentaltoendpointcontrol AT yoonjinchoi olderadultsuseamotorplanthatisdetrimentaltoendpointcontrol AT marcelkomer olderadultsuseamotorplanthatisdetrimentaltoendpointcontrol AT michelleweintraub olderadultsuseamotorplanthatisdetrimentaltoendpointcontrol AT basmayacoubi olderadultsuseamotorplanthatisdetrimentaltoendpointcontrol AT evangelosachristou olderadultsuseamotorplanthatisdetrimentaltoendpointcontrol
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Older adults use a motor plan that is detrimental to endpoint control

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