Preference and torque asymmetry for elbow joint

Extensively unilateral recruitment for daily activities may determine performance asymmetries in favor of the preferred side eliciting functional adaptation. Our study evaluated asymmetries in elbow torque output between preferred and non-preferred limbs. Eighteen subjects performed maximal elbow flexor and extensor isometric contractions at five different elbow joint angles (0º, 30º, 60º, 90º, 120º) and five different angular velocities (60, 120, 180, 240, 300º.s-1) on an isokinetic dynamometer. Higher flexor torque in favor of preferred arm was observed at 90º of flexion (p<0.05), which also corresponded to the highest torque produced (p<0.05). The fact that joint angle influenced torque asymmetries, whereas angular velocity did not, suggest that the observed asymmetry is likely related to preferential recruitment of elbow flexors at a 90º joint angle for daily tasks requiring high levels of force production. Muscle functional adaptation to frequent stimuli at this joint angle in healthy subjects may explain these results.

Saved in:
Bibliographic Details
Main Authors: Carpes,Felipe Pivetta, Geremia,Jeam Marcel, Karolczak,Ana Paula Barcellos, Diefenthaeler,Fernando, Vaz,Marco Aurélio
Format: Digital revista
Language:English
Published: Universidade Estadual Paulista 2012
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742012000200012
Tags: Add Tag
No Tags, Be the first to tag this record!
id oai:scielo:S1980-65742012000200012
record_format ojs
spelling oai:scielo:S1980-657420120002000122012-08-03Preference and torque asymmetry for elbow jointCarpes,Felipe PivettaGeremia,Jeam MarcelKarolczak,Ana Paula BarcellosDiefenthaeler,FernandoVaz,Marco Aurélio functional lateralization learning transference limb preference motor learning Extensively unilateral recruitment for daily activities may determine performance asymmetries in favor of the preferred side eliciting functional adaptation. Our study evaluated asymmetries in elbow torque output between preferred and non-preferred limbs. Eighteen subjects performed maximal elbow flexor and extensor isometric contractions at five different elbow joint angles (0º, 30º, 60º, 90º, 120º) and five different angular velocities (60, 120, 180, 240, 300º.s-1) on an isokinetic dynamometer. Higher flexor torque in favor of preferred arm was observed at 90º of flexion (p<0.05), which also corresponded to the highest torque produced (p<0.05). The fact that joint angle influenced torque asymmetries, whereas angular velocity did not, suggest that the observed asymmetry is likely related to preferential recruitment of elbow flexors at a 90º joint angle for daily tasks requiring high levels of force production. Muscle functional adaptation to frequent stimuli at this joint angle in healthy subjects may explain these results.info:eu-repo/semantics/openAccessUniversidade Estadual PaulistaMotriz: Revista de Educação Física v.18 n.2 20122012-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742012000200012en10.1590/S1980-65742012000200012
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Carpes,Felipe Pivetta
Geremia,Jeam Marcel
Karolczak,Ana Paula Barcellos
Diefenthaeler,Fernando
Vaz,Marco Aurélio
spellingShingle Carpes,Felipe Pivetta
Geremia,Jeam Marcel
Karolczak,Ana Paula Barcellos
Diefenthaeler,Fernando
Vaz,Marco Aurélio
Preference and torque asymmetry for elbow joint
author_facet Carpes,Felipe Pivetta
Geremia,Jeam Marcel
Karolczak,Ana Paula Barcellos
Diefenthaeler,Fernando
Vaz,Marco Aurélio
author_sort Carpes,Felipe Pivetta
title Preference and torque asymmetry for elbow joint
title_short Preference and torque asymmetry for elbow joint
title_full Preference and torque asymmetry for elbow joint
title_fullStr Preference and torque asymmetry for elbow joint
title_full_unstemmed Preference and torque asymmetry for elbow joint
title_sort preference and torque asymmetry for elbow joint
description Extensively unilateral recruitment for daily activities may determine performance asymmetries in favor of the preferred side eliciting functional adaptation. Our study evaluated asymmetries in elbow torque output between preferred and non-preferred limbs. Eighteen subjects performed maximal elbow flexor and extensor isometric contractions at five different elbow joint angles (0º, 30º, 60º, 90º, 120º) and five different angular velocities (60, 120, 180, 240, 300º.s-1) on an isokinetic dynamometer. Higher flexor torque in favor of preferred arm was observed at 90º of flexion (p<0.05), which also corresponded to the highest torque produced (p<0.05). The fact that joint angle influenced torque asymmetries, whereas angular velocity did not, suggest that the observed asymmetry is likely related to preferential recruitment of elbow flexors at a 90º joint angle for daily tasks requiring high levels of force production. Muscle functional adaptation to frequent stimuli at this joint angle in healthy subjects may explain these results.
publisher Universidade Estadual Paulista
publishDate 2012
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742012000200012
work_keys_str_mv AT carpesfelipepivetta preferenceandtorqueasymmetryforelbowjoint
AT geremiajeammarcel preferenceandtorqueasymmetryforelbowjoint
AT karolczakanapaulabarcellos preferenceandtorqueasymmetryforelbowjoint
AT diefenthaelerfernando preferenceandtorqueasymmetryforelbowjoint
AT vazmarcoaurelio preferenceandtorqueasymmetryforelbowjoint
_version_ 1756434598561054720