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Shifts of the point-of-change can be attributed to a lower mechanical cost of motor execution

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Bibliographic Details
Title: Shifts of the point-of-change can be attributed to a lower mechanical cost of motor execution
Authors: Schütz, Christoph, Schack, Thomas
Source: Exp Brain Res
Publisher Information: Springer Science and Business Media LLC, 2020.
Publication Year: 2020
Subject Terms: Adult, Male, 05 social sciences, Female [MeSH], Cognitive cost, Mechanical cost, Biomechanical Phenomena/physiology [MeSH], Adult [MeSH], Humans [MeSH], Motor Activity/physiology [MeSH], Male [MeSH], Reaction Time/physiology [MeSH], Young Adult [MeSH], Motor hysteresis, Reaching, Functional Laterality/physiology [MeSH], Motor planning, Handedness, Psychomotor Performance/physiology [MeSH], Research Article, Motor Activity, 16. Peace & justice, Functional Laterality, Biomechanical Phenomena, Young Adult, 03 medical and health sciences, 0302 clinical medicine, Reaction Time, Humans, Female, 0501 psychology and cognitive sciences, 10. No inequality, Psychomotor Performance
Description: In a previous study on hand selection in a sequential reaching task, the authors showed a shift of the point-of-change (POC) to the left of the midline. This implies that participants conducted a number of contralateral reaches with their dominant, right hand. Contralateral movements have longer planning and execution times and a lower precision. In the current study, we asked whether lower mechanical costs of motor execution or lower cognitive costs of motor planning compensated for these disadvantages. Theories on hemispheric differences postulate lower mechanical costs in the dominant hemisphere and lower cognitive costs in the left hemisphere (independent of handedness). In right-handed participants, both factors act agonistically to reduce the total cost of right-handed reaches. To distinguish between the cost factors, we had left- and right-hand-dominant participants execute a sequential, unimanual reaching task. Results showed a left-shift of the POC in the right-handed and a right-shift in the left-handed group. Both shifts were similar in magnitude. These findings indicate that only the mechanical cost of motor execution compensates for the disadvantages of the contralateral reaches, while the cognitive cost of motor planning is irrelevant for the POC shift.
Document Type: Article
Other literature type
Language: English
ISSN: 1432-1106
0014-4819
DOI: 10.1007/s00221-020-05781-3
Access URL: https://link.springer.com/content/pdf/10.1007/s00221-020-05781-3.pdf
https://pubmed.ncbi.nlm.nih.gov/32219475
https://link.springer.com/article/10.1007/s00221-020-05781-3
https://pubmed.ncbi.nlm.nih.gov/32219475/
https://link.springer.com/content/pdf/10.1007/s00221-020-05781-3.pdf
https://europepmc.org/article/MED/32219475
https://www.scilit.net/article/06544711558ad127640d8bbc6c2d04ca
https://www.ncbi.nlm.nih.gov/pubmed/32219475
https://pub.uni-bielefeld.de/record/2942724
https://doi.org/10.1007/s00221-020-05781-3
https://repository.publisso.de/resource/frl:6469208
Rights: CC BY
"In Copyright" Rights Statement
Accession Number: edsair.doi.dedup.....23b8b39000a3971b5d7de548ca0a7b43
Database: OpenAIRE
Description
Abstract:In a previous study on hand selection in a sequential reaching task, the authors showed a shift of the point-of-change (POC) to the left of the midline. This implies that participants conducted a number of contralateral reaches with their dominant, right hand. Contralateral movements have longer planning and execution times and a lower precision. In the current study, we asked whether lower mechanical costs of motor execution or lower cognitive costs of motor planning compensated for these disadvantages. Theories on hemispheric differences postulate lower mechanical costs in the dominant hemisphere and lower cognitive costs in the left hemisphere (independent of handedness). In right-handed participants, both factors act agonistically to reduce the total cost of right-handed reaches. To distinguish between the cost factors, we had left- and right-hand-dominant participants execute a sequential, unimanual reaching task. Results showed a left-shift of the POC in the right-handed and a right-shift in the left-handed group. Both shifts were similar in magnitude. These findings indicate that only the mechanical cost of motor execution compensates for the disadvantages of the contralateral reaches, while the cognitive cost of motor planning is irrelevant for the POC shift.
ISSN:14321106
00144819
DOI:10.1007/s00221-020-05781-3