Kinematic and EMG analysis of the stretch response of rectus femoris in pendulum test

Authors

  • Silvia Peveroni Centro de Rehabilitación Teletón, Laboratorio de Marcha, Montevideo, Uruguay.
  • Magdalena Vázquez Centro de Rehabilitación Teletón, Laboratorio de Marcha, Montevideo, Uruguay.
  • Nicolás Peña Centro de Rehabilitación Teletón, Laboratorio de Marcha, Montevideo, Uruguay.
  • Erika Jorajuría Centro de Rehabilitación Teletón, Laboratorio de Marcha, Montevideo, Uruguay.
  • Hamlet Suarez Hospital Británico, Laboratorio de Otoneurología, Montevideo, Uruguay.
  • Enrique Ferreira Universidad Católica, Departamento de Ingeniería, Montevideo, Uruguay.

Abstract

The aim of this study is to analyze the preliminary results of a test protocol introduced for the pendulum test for rectus femoris spasticity assessment using reflective markers and surface electromyography electrodes in a gait analysis setting. Materials and methods: 27 children with diagnosis of cerebral palsy were included. Pendulum test was performed with the proposed protocol and registered clinical spasticity assessment using Modified Ashworth Scale (MAS). Results: 53 lower limbs were registered (1 excluded for incomplete relaxation). They were divided in 2 groups according to the absence (MAS=0) or presence (MAS≥1) of spasticity. These groups showed significant differences in the range of motion of the first peak during pendulum test (p=0.001). The group without spasticity showed mean positive values (overlapping the initial resting position) and the group with spasticity had a clear tendency to restriction of movement, the first peak of flexion being shorter than the resting position.  Conclusion: These results show the test is able to identify rectus femoris spasticity in this population.  Quantitative tools for spasticity assessment are critical for treatment planning and outcome assessment in rehabilitation medicine.

 

Keywords— cerebral palsy, spasticity, rectus femoris, pendulum test.

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Published

07/11/2020

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Scientific articles

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