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Effects of Carpal Tunnel Syndrome on Dexterous Manipulation Are Grip Type-Dependent

Carpal tunnel syndrome (CTS) impairs sensation of a subset of digits. Although the effects of CTS on manipulation performed with CTS-affected digits have been studied using precision grip tasks, the extent to which CTS affects multi-digit force coordination has only recently been studied. Whole-hand...

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Autores principales: Zhang, Wei, Johnston, Jamie A., Ross, Mark A., Sanniec, Kyle, Gleason, Elizabeth A., Dueck, Amylou C., Santello, Marco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3542366/
https://www.ncbi.nlm.nih.gov/pubmed/23326498
http://dx.doi.org/10.1371/journal.pone.0053751
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author Zhang, Wei
Johnston, Jamie A.
Ross, Mark A.
Sanniec, Kyle
Gleason, Elizabeth A.
Dueck, Amylou C.
Santello, Marco
author_facet Zhang, Wei
Johnston, Jamie A.
Ross, Mark A.
Sanniec, Kyle
Gleason, Elizabeth A.
Dueck, Amylou C.
Santello, Marco
author_sort Zhang, Wei
collection PubMed
description Carpal tunnel syndrome (CTS) impairs sensation of a subset of digits. Although the effects of CTS on manipulation performed with CTS-affected digits have been studied using precision grip tasks, the extent to which CTS affects multi-digit force coordination has only recently been studied. Whole-hand manipulation studies have shown that CTS patients retain the ability to modulate multi-digit forces to object mass, mass distribution, and texture. However, CTS results in sensorimotor deficits relative to healthy controls, including significantly larger grip force and lower ability to balance the torques generated by the digits. Here we investigated the effects of CTS on multi-digit force modulation to object weight when manipulating an object with a variable number of fingers. We hypothesized that CTS patients would be able to modulate digit forces to object weight. However, as different grip types involve the exclusive use of CTS-affected digits (‘uniform’ grips) or a combination of CTS-affected and non-affected digits (‘mixed’ grips), we addressed the question of whether ‘mixed’ grips would reduce or worsen CTS-induced force coordination deficits. The former scenario would be due to adding digits with intact tactile feedback, whereas the latter scenario might occur due to a potentially greater challenge for the central nervous system of integrating ‘noisy’ and intact tactile feedback. CTS patients learned multi-digit force modulation to object weight regardless of grip type. Although controls exerted the same total grip force across all grip types, patients exerted significantly larger grip force than controls but only for manipulations with four and five digits. Importantly, this effect was due to CTS patients’ inability to change the finger force distribution when adding the ring and little fingers. These findings suggest that CTS primarily challenges sensorimotor integration processes for dexterous manipulation underlying the coordination of CTS-affected and non-affected digits.
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spelling pubmed-35423662013-01-16 Effects of Carpal Tunnel Syndrome on Dexterous Manipulation Are Grip Type-Dependent Zhang, Wei Johnston, Jamie A. Ross, Mark A. Sanniec, Kyle Gleason, Elizabeth A. Dueck, Amylou C. Santello, Marco PLoS One Research Article Carpal tunnel syndrome (CTS) impairs sensation of a subset of digits. Although the effects of CTS on manipulation performed with CTS-affected digits have been studied using precision grip tasks, the extent to which CTS affects multi-digit force coordination has only recently been studied. Whole-hand manipulation studies have shown that CTS patients retain the ability to modulate multi-digit forces to object mass, mass distribution, and texture. However, CTS results in sensorimotor deficits relative to healthy controls, including significantly larger grip force and lower ability to balance the torques generated by the digits. Here we investigated the effects of CTS on multi-digit force modulation to object weight when manipulating an object with a variable number of fingers. We hypothesized that CTS patients would be able to modulate digit forces to object weight. However, as different grip types involve the exclusive use of CTS-affected digits (‘uniform’ grips) or a combination of CTS-affected and non-affected digits (‘mixed’ grips), we addressed the question of whether ‘mixed’ grips would reduce or worsen CTS-induced force coordination deficits. The former scenario would be due to adding digits with intact tactile feedback, whereas the latter scenario might occur due to a potentially greater challenge for the central nervous system of integrating ‘noisy’ and intact tactile feedback. CTS patients learned multi-digit force modulation to object weight regardless of grip type. Although controls exerted the same total grip force across all grip types, patients exerted significantly larger grip force than controls but only for manipulations with four and five digits. Importantly, this effect was due to CTS patients’ inability to change the finger force distribution when adding the ring and little fingers. These findings suggest that CTS primarily challenges sensorimotor integration processes for dexterous manipulation underlying the coordination of CTS-affected and non-affected digits. Public Library of Science 2013-01-10 /pmc/articles/PMC3542366/ /pubmed/23326498 http://dx.doi.org/10.1371/journal.pone.0053751 Text en © 2013 Zhang et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Zhang, Wei
Johnston, Jamie A.
Ross, Mark A.
Sanniec, Kyle
Gleason, Elizabeth A.
Dueck, Amylou C.
Santello, Marco
Effects of Carpal Tunnel Syndrome on Dexterous Manipulation Are Grip Type-Dependent
title Effects of Carpal Tunnel Syndrome on Dexterous Manipulation Are Grip Type-Dependent
title_full Effects of Carpal Tunnel Syndrome on Dexterous Manipulation Are Grip Type-Dependent
title_fullStr Effects of Carpal Tunnel Syndrome on Dexterous Manipulation Are Grip Type-Dependent
title_full_unstemmed Effects of Carpal Tunnel Syndrome on Dexterous Manipulation Are Grip Type-Dependent
title_short Effects of Carpal Tunnel Syndrome on Dexterous Manipulation Are Grip Type-Dependent
title_sort effects of carpal tunnel syndrome on dexterous manipulation are grip type-dependent
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3542366/
https://www.ncbi.nlm.nih.gov/pubmed/23326498
http://dx.doi.org/10.1371/journal.pone.0053751
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