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  • Sciatic nerve stiffness is not changed immediately after a slump neurodynamics technique

    Author(s)
    Neto, Tiago
    Freitas, Sandro R
    Andrade, Ricardo J
    Gomes, Joao
    Vaz, Joao
    Mendes, Bruno
    Firmino, Telmo
    Nordez, Antoine
    Oliveira, Raul
    Griffith University Author(s)
    Nobrega Andrade, Ricardo J. J.
    Year published
    2017
    Metadata
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    Abstract
    Background: Neurodynamics techniques aim to assess and improve neural mechanosensitivity. However, there is no in vivo evidence regarding the mechanical effects of these techniques in the nerve stiffness. This study examined the immediate effects of a slump neurodynamics technique in the sciatic nerve shear wave velocity (SWV. i.e. an index of stiffness) using ultrasound-based elastography. Methods: Fourteen healthy participants were included in this experiment. Sciatic SWV and ankle passive torque were measured during a passive ankle dorsiflexion motion (2°/s), before and immediately after 3 minutes of slump neurodynamics ...
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    Background: Neurodynamics techniques aim to assess and improve neural mechanosensitivity. However, there is no in vivo evidence regarding the mechanical effects of these techniques in the nerve stiffness. This study examined the immediate effects of a slump neurodynamics technique in the sciatic nerve shear wave velocity (SWV. i.e. an index of stiffness) using ultrasound-based elastography. Methods: Fourteen healthy participants were included in this experiment. Sciatic SWV and ankle passive torque were measured during a passive ankle dorsiflexion motion (2°/s), before and immediately after 3 minutes of slump neurodynamics technique, randomly applied to one lower limb. The contralateral limb served as control. Results: The slump intervention did not change the sciatic SWV (P=0.78), nor the dorsiflexion passive torque (P=0.14), throughout the ankle dorsiflexion motion. Excellent values of intra-rater repeatability (ICC=0.88, 0.68-0.96), and low values of standard error of measurement (0.59 m/s, 0.35-1.15m/s), were observed for the SWV measurements. Conclusions: The sciatic nerve stiffness of healthy participants did not change immediately after a slump neurodynamics technique, suggesting a compliance of the neural tissue to tensile loads. However, these results ought to be confirmed using other neurodynamics techniques and in other populations (e.g. peripheral neuropathies). Level of evidence: III.
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    Journal Title
    Muscle, Ligaments and Tendons Journal
    Volume
    7
    Issue
    3
    DOI
    https://doi.org/10.11138/mltj/2017.7.3.583
    Subject
    Zoology
    Sports science and exercise
    Medical physiology
    Science & Technology
    Life Sciences & Biomedicine
    Orthopedics
    elastography
    nerve biomechanics
    Publication URI
    http://hdl.handle.net/10072/408282
    Collection
    • Journal articles

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