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EUROPEAN JOURNAL OF PHYSICAL AND REHABILITATION MEDICINE

Rivista di Medicina Fisica e Riabilitativa dopo Eventi Patologici


Official Journal of the Italian Society of Physical and Rehabilitation Medicine (SIMFER), European Society of Physical and Rehabilitation Medicine (ESPRM), European Union of Medical Specialists - Physical and Rehabilitation Medicine Section (UEMS-PRM), Mediterranean Forum of Physical and Rehabilitation Medicine (MFPRM), Hellenic Society of Physical and Rehabilitation Medicine (EEFIAP)
In association with International Society of Physical and Rehabilitation Medicine (ISPRM)
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European Journal of Physical and Rehabilitation Medicine 2017 Aug 29

DOI: 10.23736/S1973-9087.17.04722-0

Copyright © 2017 EDIZIONI MINERVA MEDICA

lingua: Inglese

Co-contraction around the knee and the ankle joints during post-stroke gait

Hiba SOUISSI 1 , Raphael ZORY 1, Jonathan BREDIN 2, Nicolas ROCHE 3, Pauline GERUS 1

1 Université Côte d’Azur, Laboratory of Human Motricity, Education and Health, Nice, France; 2 Health Center Rossetti, PEP 06, Nice, France; 3 GRCTH, EA4497, CIC-IT 805, CHU Raymond Poincaré, Garches, France


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BACKGROUND: Impairments resulting from hemiparetic stroke lead to persistent difficulties with walking. Abnormal co-contraction patterns of lower limb muscles might be a compensatory mechanism to deal with its resulting gait impairments.
AIM: The aim of this study was to assess muscle co-contraction obtained from muscle moments in chronic hemiparetic patients presenting a stiff-knee gait during walking.
DESIGN: Cross-sectional study.
SETTING: Clinical movement analysis laboratory in a health center and a community hospital.
POPULATION: Twelve hemiparetic patients 6 months’ post-stroke (mean±SD age 49.3±12.5) walking with a stiff-knee-gait (SKG) and twelve healthy adults (mean±SD age 23.5±7.7).
METHODS: Hemiparetic patients walked at their natural gait speed while healthy adults walked at their natural and slow gait speed. Spatiotemporal, kinetic and kinematic gait parameters were determined for both lower limbs. Co-contraction index at the knee and the ankle was calculated from muscle moments estimated using an EMG-driven model during the first (DS1) and second (DS2) double support and the single support (SS) phases and the swing phase (SW).
RESULTS: The results revealed that chronic stroke patients have reduced ankle co-contraction and increased knee co-contraction during DS1 phase, increased ankle co-contraction during DS2 phase and increased knee co-contraction during SW phase on the paretic side. On the non-paretic side, muscle co-contraction was higher at the knee during SS phase.
CONCLUSIONS: Increased co-contraction during walking in both the paretic and the non-paretic side, in patients with hemiparesis exhibiting a SKG, might be an adaptive strategy to increase walking stability, as it may be related to spasticity, but also could result in a high metabolic cost.
CLINICAL REHABILITATION IMPACT: The information obtained in this study may be used to support rehabilitation programs focusing on the selectivity of movement control such as strength or power training.


KEY WORDS: Co-contraction - EMG-driven modelling - Post-stroke gait - Muscle moment

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Publication History

Article first published online: August 29, 2017
Manuscript accepted: August 25, 2017
Manuscript revised: July 19, 2017
Manuscript received: March 6, 2017

Per citare questo articolo

Souissi H, Zory R, Bredin J, Roche N, Gerus P. Co-contraction around the knee and the ankle joints during post-stroke gait. Eur J Phys Rehabil Med 2017 Aug 29. DOI: 10.23736/S1973-9087.17.04722-0

Corresponding author e-mail

hiba.souissi@unice.fr