Impaired mechanical properties of Achilles tendon in spastic stroke survivors: an observational study
Autor: | Natália Batista Albuquerque Goulart, Fernando de Aguiar Lemos, Anton Arndt, Bruno Freire, Jefferson Becker, Caroline Pieta Dias, Camila Dias de Castro, Marco Aurélio Vaz |
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Rok vydání: | 2019 |
Předmět: |
Adult
Male 030506 rehabilitation medicine.medical_specialty Achilles Tendon 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Elastic Modulus Isometric Contraction medicine Spastic Humans Spasticity Stroke survivor Range of Motion Articular skin and connective tissue diseases Muscle Skeletal Paresis Aged Ultrasonography Community and Home Care Achilles tendon business.industry Rehabilitation Middle Aged Stroke medicine.anatomical_structure Muscle Spasticity Case-Control Studies Muscle strength Observational study Female sense organs Neurology (clinical) medicine.symptom Ankle 0305 other medical science business 030217 neurology & neurosurgery Ankle Joint |
Zdroj: | Topics in stroke rehabilitation. 26(4) |
ISSN: | 1945-5119 |
Popis: | The spasticity could lead to decreased functional capacity and changes in musculoskeletal tissue.To compare the Achilles tendon properties between the affected and contralateral limbs of participants with spasticity due to stroke and the healthy subjects.Fifteen individuals with ankle spasticity due to stroke and 15 healthy subjects were recruited. Maximal isometric ankle joint torque was obtained with an isokinetic dynamometer, and an ultrasound was used to determine tendon length, tendon cross-sectional area, and the medial gastrocnemius myotendinous junction displacement. The Achilles tendon strength, displacement, stress, strain, stiffness, and Young's modulus were obtained during a maximum voluntary isometric plantarflexion contraction.There were no differences between Achilles tendon length among participants. Both limbs of participants with stroke showed reduced tendon cross-sectional area (~18%) compared to healthy limb. The affected limb showed decreased tendon strength (686 ± 293.3 N), displacement (10.6 ± 1.7 mm), Young's modulus values (849 ± 235.6 MPa), and lower stiffness (196.6 ± 67.6 N/mm) compared to the contralateral limb (strength, 1357.1 ± 294.8 N; displacement, 15.2 ± 5.5 mm; Young's modulus, 1431.8 ± 301.9 MPa; stiffness, 337.5 ± 98.1 N/mm) and to the healthy limb. The contralateral limb also showed decreased tendon strength (~26.2%) and stiffness (~21.5%) compared to the healthy group.There is a decrement in Achilles tendon morphological and mechanical properties of the affected limb in individuals with spasticity due to stroke. The contralateral limb had a thinner tendon more compliant likely to physical activity reduction. |
Databáze: | OpenAIRE |
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