HapticV1, Ncbi, Merge, bibRecord, 002038

Effects of Carpal Tunnel Syndrome on adaptation of multi-digit forces to object texture

Identifieur interne : 002038 ( Ncbi/Merge ); précédent : 002037; suivant : 002039

Effects of Carpal Tunnel Syndrome on adaptation of multi-digit forces to object texture

Auteurs : Mostafa Afifi [Canada] ; Marco Santello [États-Unis] ; Jamie A. Johnston [Canada]

Source :

Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology [ 1388-2457 ] ; 2012.

RBID : PMC:3433593

Abstract

Objective

The ability to adapt digit forces to object properties requires both anticipatory and feedback-driven control mechanisms which can be disrupted in individuals with a compromised sensorimotor system. Carpal Tunnel Syndrome (CTS) is a median nerve compression neuropathy affecting sensory and motor function in a subset of digits in the hand. Our objective was to examine how CTS patients coordinate anticipatory and feedback-driven control for multi-digit grip force adaptation.

Methods

We asked CTS patients and healthy controls to grasp, lift, and hold an object with different textures.

Results

CTS patients effectively adapted their digit forces to changes in object texture, but produced excessive grip forces. CTS patients also produced larger peak force rate profiles with fewer modulations of normal force prior to lift onset than did controls and continued to increase grip force throughout the lift whereas forces were set at lift onset for the controls.

Conclusions

These findings suggest that CTS patients use less online sensory feedback for fine-tuning their grip forces, relying more on anticipatory control than do healthy controls.

Significance

These characteristics in force adaptation in CTS patients indicate impaired sensorimotor control which leads to excessive grip forces with the potential to further exacerbate their median nerve compression.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3433593

DOI: 10.1016/j.clinph.2012.04.013
PubMed: 22627019
PubMed Central: 3433593

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PMC:3433593

Le document en format XML

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<author><name sortKey="Afifi, Mostafa" sort="Afifi, Mostafa" uniqKey="Afifi M" first="Mostafa" last="Afifi">Mostafa Afifi</name>
<affiliation wicri:level="4"><nlm:aff id="A1">Faculty of Kinesiology, University of Calgary, Calgary, AB T2N 1N4, Canada</nlm:aff>
<country xml:lang="fr">Canada</country>
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<author><name sortKey="Santello, Marco" sort="Santello, Marco" uniqKey="Santello M" first="Marco" last="Santello">Marco Santello</name>
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<author><name sortKey="Johnston, Jamie A" sort="Johnston, Jamie A" uniqKey="Johnston J" first="Jamie A." last="Johnston">Jamie A. Johnston</name>
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<p id="P2">The ability to adapt digit forces to object properties requires both anticipatory and feedback-driven control mechanisms which can be disrupted in individuals with a compromised sensorimotor system. Carpal Tunnel Syndrome (CTS) is a median nerve compression neuropathy affecting sensory and motor function in a subset of digits in the hand. Our objective was to examine how CTS patients coordinate anticipatory and feedback-driven control for multi-digit grip force adaptation.</p>
</sec>
<sec id="S2"><title>Methods</title>
<p id="P3">We asked CTS patients and healthy controls to grasp, lift, and hold an object with different textures.</p>
</sec>
<sec id="S3"><title>Results</title>
<p id="P4">CTS patients effectively adapted their digit forces to changes in object texture, but produced excessive grip forces. CTS patients also produced larger peak force rate profiles with fewer modulations of normal force prior to lift onset than did controls and continued to increase grip force throughout the lift whereas forces were set at lift onset for the controls.</p>
</sec>
<sec id="S4"><title>Conclusions</title>
<p id="P5">These findings suggest that CTS patients use less online sensory feedback for fine-tuning their grip forces, relying more on anticipatory control than do healthy controls.</p>
</sec>
<sec id="S5"><title>Significance</title>
<p id="P6">These characteristics in force adaptation in CTS patients indicate impaired sensorimotor control which leads to excessive grip forces with the potential to further exacerbate their median nerve compression.</p>
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Faculty of Kinesiology, University of Calgary, Calgary, AB T2N 1N4, Canada</aff>
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Hotchkiss Brain Institute, University of Calgary, Calgary, AB T2N 1N4, Canada</aff>
<aff id="A3"><label>3</label>
School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ 85287, USA</aff>
<author-notes><corresp id="FN1">Address for correspondence: Jamie A. Johnston, Faculty of Kinesiology, Kinesiology Building B 420, University of Calgary, Calgary, AB, Canada T3K 5H4, Ph.: +1-403-220-3649, Fax: +1-403 -284-3553, <email>johnston@kin.ucalgary.ca</email>
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<permissions><copyright-statement>© 2012 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.</copyright-statement>
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<abstract><sec id="S1"><title>Objective</title>
<p id="P2">The ability to adapt digit forces to object properties requires both anticipatory and feedback-driven control mechanisms which can be disrupted in individuals with a compromised sensorimotor system. Carpal Tunnel Syndrome (CTS) is a median nerve compression neuropathy affecting sensory and motor function in a subset of digits in the hand. Our objective was to examine how CTS patients coordinate anticipatory and feedback-driven control for multi-digit grip force adaptation.</p>
</sec>
<sec id="S2"><title>Methods</title>
<p id="P3">We asked CTS patients and healthy controls to grasp, lift, and hold an object with different textures.</p>
</sec>
<sec id="S3"><title>Results</title>
<p id="P4">CTS patients effectively adapted their digit forces to changes in object texture, but produced excessive grip forces. CTS patients also produced larger peak force rate profiles with fewer modulations of normal force prior to lift onset than did controls and continued to increase grip force throughout the lift whereas forces were set at lift onset for the controls.</p>
</sec>
<sec id="S4"><title>Conclusions</title>
<p id="P5">These findings suggest that CTS patients use less online sensory feedback for fine-tuning their grip forces, relying more on anticipatory control than do healthy controls.</p>
</sec>
<sec id="S5"><title>Significance</title>
<p id="P6">These characteristics in force adaptation in CTS patients indicate impaired sensorimotor control which leads to excessive grip forces with the potential to further exacerbate their median nerve compression.</p>
</sec>
</abstract>
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Effects of Carpal Tunnel Syndrome on adaptation of multi-digit forces to object texture

Effects of Carpal Tunnel Syndrome on adaptation of multi-digit forces to object texture

Source :

Abstract

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Links to Exploration step

Le document en format XML

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Pour générer des pages wiki