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.
Main Authors: | , , , , |
---|---|
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 |