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Neural Correlates of Stepping in Healthy Elderly: Parietal and Prefrontal Cortex Activation Reflects Cognitive-Motor Interference Effects

Gait analysis involving cognitive-motor dual task (DT) is a diagnostic tool in geriatrics. Cognitive-motor interference effects during DT, such as decreased walking speed and increased step-to-step variability, have a high predictive value for fall risk and cognitive decline. Previously we showed th...

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Autores principales: Reinhardt, Julia, Rus-Oswald, Oana G., Bürki, Céline N., Bridenbaugh, Stephanie A., Krumm, Sabine, Michels, Lars, Stippich, Christoph, Kressig, Reto W., Blatow, Maria
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7550687/
https://www.ncbi.nlm.nih.gov/pubmed/33132879
http://dx.doi.org/10.3389/fnhum.2020.566735
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author Reinhardt, Julia
Rus-Oswald, Oana G.
Bürki, Céline N.
Bridenbaugh, Stephanie A.
Krumm, Sabine
Michels, Lars
Stippich, Christoph
Kressig, Reto W.
Blatow, Maria
author_facet Reinhardt, Julia
Rus-Oswald, Oana G.
Bürki, Céline N.
Bridenbaugh, Stephanie A.
Krumm, Sabine
Michels, Lars
Stippich, Christoph
Kressig, Reto W.
Blatow, Maria
author_sort Reinhardt, Julia
collection PubMed
description Gait analysis involving cognitive-motor dual task (DT) is a diagnostic tool in geriatrics. Cognitive-motor interference effects during DT, such as decreased walking speed and increased step-to-step variability, have a high predictive value for fall risk and cognitive decline. Previously we showed the feasibility of DT during functional magnetic resonance imaging (fMRI) using an MRI-compatible stepping device. Here, we improved the DT-fMRI protocol with respect to task difficulty and signal robustness, making it more suitable for individualized analysis to better understand the neuronal substrates of cognitive-motor interference effects. Thirty healthy elderly subjects performed cognitive and motor single tasks (ST; stepping or finger tapping), as well as combined cognitive-motor DT during fMRI. After whole brain group level analysis, a region-of-interest (ROI) analysis and the computation of dual task costs (DTC = activation difference ratio ST/DT) at individual level were performed. Activations in the primary (M1) and secondary motor as well as in parietal and prefrontal cortex were measured at the group level during DT. Motor areas showed decreased activation whereas parietal and prefrontal areas showed increased activation in DT vs. ST. Stepping yielded more distinctive activations in DT vs. ST than finger tapping. At the individual level, the most robust activations (based on occurrence probability and signal strength) were measured in the stepping condition, in M1, supplementary motor area (SMA) and superior parietal lobule/intraparietal sulcus (SPL/IPS). The distribution of individual DTC in SPL/IPS during stepping suggested a separation of subjects in groups with high vs. low DTC. This study proposes an improved cognitive-motor DT-fMRI protocol and a standardized analysis routine of functional neuronal markers for cognitive-motor interference at the individual level.
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spelling pubmed-75506872020-10-30 Neural Correlates of Stepping in Healthy Elderly: Parietal and Prefrontal Cortex Activation Reflects Cognitive-Motor Interference Effects Reinhardt, Julia Rus-Oswald, Oana G. Bürki, Céline N. Bridenbaugh, Stephanie A. Krumm, Sabine Michels, Lars Stippich, Christoph Kressig, Reto W. Blatow, Maria Front Hum Neurosci Neuroscience Gait analysis involving cognitive-motor dual task (DT) is a diagnostic tool in geriatrics. Cognitive-motor interference effects during DT, such as decreased walking speed and increased step-to-step variability, have a high predictive value for fall risk and cognitive decline. Previously we showed the feasibility of DT during functional magnetic resonance imaging (fMRI) using an MRI-compatible stepping device. Here, we improved the DT-fMRI protocol with respect to task difficulty and signal robustness, making it more suitable for individualized analysis to better understand the neuronal substrates of cognitive-motor interference effects. Thirty healthy elderly subjects performed cognitive and motor single tasks (ST; stepping or finger tapping), as well as combined cognitive-motor DT during fMRI. After whole brain group level analysis, a region-of-interest (ROI) analysis and the computation of dual task costs (DTC = activation difference ratio ST/DT) at individual level were performed. Activations in the primary (M1) and secondary motor as well as in parietal and prefrontal cortex were measured at the group level during DT. Motor areas showed decreased activation whereas parietal and prefrontal areas showed increased activation in DT vs. ST. Stepping yielded more distinctive activations in DT vs. ST than finger tapping. At the individual level, the most robust activations (based on occurrence probability and signal strength) were measured in the stepping condition, in M1, supplementary motor area (SMA) and superior parietal lobule/intraparietal sulcus (SPL/IPS). The distribution of individual DTC in SPL/IPS during stepping suggested a separation of subjects in groups with high vs. low DTC. This study proposes an improved cognitive-motor DT-fMRI protocol and a standardized analysis routine of functional neuronal markers for cognitive-motor interference at the individual level. Frontiers Media S.A. 2020-09-29 /pmc/articles/PMC7550687/ /pubmed/33132879 http://dx.doi.org/10.3389/fnhum.2020.566735 Text en Copyright © 2020 Reinhardt, Rus-Oswald, Bürki, Bridenbaugh, Krumm, Michels, Stippich, Kressig and Blatow. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Neuroscience
Reinhardt, Julia
Rus-Oswald, Oana G.
Bürki, Céline N.
Bridenbaugh, Stephanie A.
Krumm, Sabine
Michels, Lars
Stippich, Christoph
Kressig, Reto W.
Blatow, Maria
Neural Correlates of Stepping in Healthy Elderly: Parietal and Prefrontal Cortex Activation Reflects Cognitive-Motor Interference Effects
title Neural Correlates of Stepping in Healthy Elderly: Parietal and Prefrontal Cortex Activation Reflects Cognitive-Motor Interference Effects
title_full Neural Correlates of Stepping in Healthy Elderly: Parietal and Prefrontal Cortex Activation Reflects Cognitive-Motor Interference Effects
title_fullStr Neural Correlates of Stepping in Healthy Elderly: Parietal and Prefrontal Cortex Activation Reflects Cognitive-Motor Interference Effects
title_full_unstemmed Neural Correlates of Stepping in Healthy Elderly: Parietal and Prefrontal Cortex Activation Reflects Cognitive-Motor Interference Effects
title_short Neural Correlates of Stepping in Healthy Elderly: Parietal and Prefrontal Cortex Activation Reflects Cognitive-Motor Interference Effects
title_sort neural correlates of stepping in healthy elderly: parietal and prefrontal cortex activation reflects cognitive-motor interference effects
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7550687/
https://www.ncbi.nlm.nih.gov/pubmed/33132879
http://dx.doi.org/10.3389/fnhum.2020.566735
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