Controle postural em pacientes com lesão do ligamento cruzado anterior
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Data
2010-12-01
Autores
Borin, Gabriela
Masullo, Catia de Lourdes
Bonfim, Thatia Regina
Oliveira, Anamaria Siriani de
Paccola, Cleber Antônio Jansen
Barela, José Ângelo [UNESP]
Bevilaqua-Grossi, Débora
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade de São Paulo (USP)
Resumo
A lesão do ligamento cruzado anterior (LCA) do joelho acarreta alterações somatosensoriais em função da perda de informações provenientes dos mecanorreceptores presentes no LCA. Esses receptores constituem importante fonte de informação sensorial, afetando o desempenho de vários atos motores, dentre os quais o controle postural. O estudo objetivou analisar o controle postural de indivíduos com joelhos normais e com lesão unilateral do LCA. Participaram 15 voluntários com lesão do LCA (grupo lesado) e 15 voluntários com joelhos normais (grupo controle). O controle postural foi analisado por plataforma de força, sendo o voluntário instruído a assumir a situação experimental em apoio unipodal direito e esquerdo, posicionado no centro da plataforma de modo estático e com os olhos fechados. A plataforma de força forneceu informações de forças e momentos no eixo vertical e horizontal, a partir das quais foi obtida a área de deslocamento do centro de pressão nas direções ântero-posterior e médio-lateral. Os resultados mostram que indivíduos com lesão do LCA apresentaram maior amplitude média de oscilação comparados aos do grupo controle, sugerindo que o deficit no controle postural seja devido à perda de informações proprioceptivas nos indivíduos com LCA. Esses resultados têm implicações para a abordagem clínica de indivíduos com lesão do LCA.
Anterior cruciate ligament (ACL) injury leads to sensorimotor changes due to lack of information from mechanoreceptors at the ACL. These receptors are an important source of sensory information, affecting the performance of various motor responses, among which postural control. The purpose of this study was to assess postural control in individuals with normal knees and with unilateral ACL injury. Fifteen subjects with ACL injury and 15 healthy young subjects (control group) were submitted to postural control assessment by standing in single-leg stance (both right and left) on a force platform; they stood at the centre of the platform, with eyes closed, remaining in the position for 30 seconds. The force platform provided information on forces and moments along both vertical and horizontal axes, from which was obtained the centre of pressure displacement in anterior-posterior and medial-lateral directions. Individuals with ACL injury showed greater mean sway amplitude than healthy control ones, suggesting that their deficit in postural control might be due to lack of proprioceptive information. These results have implications for the clinical approach of individuals with ACL injury.
Anterior cruciate ligament (ACL) injury leads to sensorimotor changes due to lack of information from mechanoreceptors at the ACL. These receptors are an important source of sensory information, affecting the performance of various motor responses, among which postural control. The purpose of this study was to assess postural control in individuals with normal knees and with unilateral ACL injury. Fifteen subjects with ACL injury and 15 healthy young subjects (control group) were submitted to postural control assessment by standing in single-leg stance (both right and left) on a force platform; they stood at the centre of the platform, with eyes closed, remaining in the position for 30 seconds. The force platform provided information on forces and moments along both vertical and horizontal axes, from which was obtained the centre of pressure displacement in anterior-posterior and medial-lateral directions. Individuals with ACL injury showed greater mean sway amplitude than healthy control ones, suggesting that their deficit in postural control might be due to lack of proprioceptive information. These results have implications for the clinical approach of individuals with ACL injury.
Descrição
Palavras-chave
Biomecânica, Ligamento cruzado anterior, Postura, Propriocepção, Anterior cruciate ligament, Biomechanics, Posture, Proprioception
Como citar
Fisioterapia e Pesquisa. Universidade de São Paulo, v. 17, n. 4, p. 342-345, 2010.