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Title: | No evidence for a difference in lateralization and distinctiveness level of transcranial magnetic stimulation-derived cortical motor representations over the adult lifespan | Authors: | HEHL, Melina Swinnen, Stephan P. VAN MALDEREN, Shanti CUYPERS, Koen |
Issue Date: | 2022 | Publisher: | Source: | Frontiers in Aging Neuroscience, | Abstract: | CITATION Hehl M, Swinnen SP, Van Malderen S and Cuypers K (2022) No evidence for a difference in lateralization and distinctiveness level of transcranial magnetic stimulation-derived cortical motor representations over the adult lifespan. This study aimed to investigate the presence and patterns of age-related differences in TMS-based measures of lateralization and distinctiveness of the cortical motor representations of two different hand muscles. In a sample of seventy-three right-handed healthy participants over the adult lifespan, the first dorsal interosseus (FDI) and abductor digiti minimi (ADM) cortical motor representations of both hemispheres were acquired using transcranial magnetic stimulation (TMS). In addition, dexterity and maximum force levels were measured. Lateralization quotients were calculated for homolog behavioral and TMS measures, whereas the distinctiveness between the FDI and ADM representation within one hemisphere was quantified by the center of gravity (CoG) distance and cosine similarity. The presence and patterns of age-related changes were examined using linear, polynomial, and piecewise linear regression. No age-related differences could be identified for the lateralization quotient of behavior or cortical motor representations of both intrinsic hand muscles. Furthermore, no evidence for a change in the distinctiveness of the FDI and ADM representation with advancing age was found. In conclusion this work showed that lateralization and distinctiveness of cortical motor representations, as determined by means of TMS-based measures, remain stable over the adult lifespan. | Keywords: | transcrancial magnetic stimulation (TMS);cortical motor representation;aging;lateralization;distinctiveness;dedifferentiation | Document URI: | http://hdl.handle.net/1942/38787 | ISSN: | 1663-4365 | e-ISSN: | 1663-4365 | DOI: | 10.3389/fnagi.2022.971858 | ISI #: | 000875832000001 | Rights: | © 2022 Hehl, Swinnen, Van Malderen and Cuypers. 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. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2023 |
Appears in Collections: | Research publications |
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