Contraction history produces task-specific variations in spinal excitability in healthy human soleus muscle

Azusa Uematsu, Hirofumi Sekiguchi, Hirofumi Kobayashi, Tibor Hortobágyi, Shuji Suzuki

    Research output: Contribution to journalArticle

    Abstract

    Introduction: In human movements muscles lengthen and then shorten, or occasionally shorten and then lengthen, but it is unclear whether the nature of neural activation of the initial phase influences the neural state of the subsequent phase. We examined whether contraction history modulates spinal excitability in the healthy human soleus muscle. Methods: Subjects performed six blocks of 10 repetitions of four muscle actions consisting of specific combinations of passive shortening (PAS), and passive lengthening (PAL), shortening contraction (SHO), and lengthening contraction (LEN); that is: (1) SHO+PAL; (2) PAS+LEN; (3) PAS+PAL; and (4) SHO+LEN. Results: Compared with baseline, the H-reflex increased in the block of 300-400 s after SHO+PAL and decreased in the block of 0-100 s after PAS+LEN and SHO+LEN. Conclusions: Our results suggest that spinal excitability is potentiated during a muscle action preceded by muscle shortening, but it becomes depressed during a muscle action preceded by muscle lengthening.

    Original languageEnglish
    Pages (from-to)851-858
    Number of pages8
    JournalMuscle and Nerve
    Volume43
    Issue number6
    DOIs
    Publication statusPublished - 2011 Jun

    Fingerprint

    Skeletal Muscle
    History
    Muscles
    H-Reflex

    Keywords

    • After-effect
    • Contraction history
    • H-reflex
    • Lengthening contraction
    • Shortening contraction

    ASJC Scopus subject areas

    • Clinical Neurology
    • Cellular and Molecular Neuroscience
    • Physiology (medical)
    • Physiology

    Cite this

    Contraction history produces task-specific variations in spinal excitability in healthy human soleus muscle. / Uematsu, Azusa; Sekiguchi, Hirofumi; Kobayashi, Hirofumi; Hortobágyi, Tibor; Suzuki, Shuji.

    In: Muscle and Nerve, Vol. 43, No. 6, 06.2011, p. 851-858.

    Research output: Contribution to journalArticle

    Uematsu, A, Sekiguchi, H, Kobayashi, H, Hortobágyi, T & Suzuki, S 2011, 'Contraction history produces task-specific variations in spinal excitability in healthy human soleus muscle', Muscle and Nerve, vol. 43, no. 6, pp. 851-858. https://doi.org/10.1002/mus.21989
    Uematsu, Azusa ; Sekiguchi, Hirofumi ; Kobayashi, Hirofumi ; Hortobágyi, Tibor ; Suzuki, Shuji. / Contraction history produces task-specific variations in spinal excitability in healthy human soleus muscle. In: Muscle and Nerve. 2011 ; Vol. 43, No. 6. pp. 851-858.
    @article{a1e2a166ff4f41dc929dd1977b83d2b8,
    title = "Contraction history produces task-specific variations in spinal excitability in healthy human soleus muscle",
    abstract = "Introduction: In human movements muscles lengthen and then shorten, or occasionally shorten and then lengthen, but it is unclear whether the nature of neural activation of the initial phase influences the neural state of the subsequent phase. We examined whether contraction history modulates spinal excitability in the healthy human soleus muscle. Methods: Subjects performed six blocks of 10 repetitions of four muscle actions consisting of specific combinations of passive shortening (PAS), and passive lengthening (PAL), shortening contraction (SHO), and lengthening contraction (LEN); that is: (1) SHO+PAL; (2) PAS+LEN; (3) PAS+PAL; and (4) SHO+LEN. Results: Compared with baseline, the H-reflex increased in the block of 300-400 s after SHO+PAL and decreased in the block of 0-100 s after PAS+LEN and SHO+LEN. Conclusions: Our results suggest that spinal excitability is potentiated during a muscle action preceded by muscle shortening, but it becomes depressed during a muscle action preceded by muscle lengthening.",
    keywords = "After-effect, Contraction history, H-reflex, Lengthening contraction, Shortening contraction",
    author = "Azusa Uematsu and Hirofumi Sekiguchi and Hirofumi Kobayashi and Tibor Hortob{\'a}gyi and Shuji Suzuki",
    year = "2011",
    month = "6",
    doi = "10.1002/mus.21989",
    language = "English",
    volume = "43",
    pages = "851--858",
    journal = "Muscle and Nerve",
    issn = "0148-639X",
    publisher = "John Wiley and Sons Inc.",
    number = "6",

    }

    TY - JOUR

    T1 - Contraction history produces task-specific variations in spinal excitability in healthy human soleus muscle

    AU - Uematsu, Azusa

    AU - Sekiguchi, Hirofumi

    AU - Kobayashi, Hirofumi

    AU - Hortobágyi, Tibor

    AU - Suzuki, Shuji

    PY - 2011/6

    Y1 - 2011/6

    N2 - Introduction: In human movements muscles lengthen and then shorten, or occasionally shorten and then lengthen, but it is unclear whether the nature of neural activation of the initial phase influences the neural state of the subsequent phase. We examined whether contraction history modulates spinal excitability in the healthy human soleus muscle. Methods: Subjects performed six blocks of 10 repetitions of four muscle actions consisting of specific combinations of passive shortening (PAS), and passive lengthening (PAL), shortening contraction (SHO), and lengthening contraction (LEN); that is: (1) SHO+PAL; (2) PAS+LEN; (3) PAS+PAL; and (4) SHO+LEN. Results: Compared with baseline, the H-reflex increased in the block of 300-400 s after SHO+PAL and decreased in the block of 0-100 s after PAS+LEN and SHO+LEN. Conclusions: Our results suggest that spinal excitability is potentiated during a muscle action preceded by muscle shortening, but it becomes depressed during a muscle action preceded by muscle lengthening.

    AB - Introduction: In human movements muscles lengthen and then shorten, or occasionally shorten and then lengthen, but it is unclear whether the nature of neural activation of the initial phase influences the neural state of the subsequent phase. We examined whether contraction history modulates spinal excitability in the healthy human soleus muscle. Methods: Subjects performed six blocks of 10 repetitions of four muscle actions consisting of specific combinations of passive shortening (PAS), and passive lengthening (PAL), shortening contraction (SHO), and lengthening contraction (LEN); that is: (1) SHO+PAL; (2) PAS+LEN; (3) PAS+PAL; and (4) SHO+LEN. Results: Compared with baseline, the H-reflex increased in the block of 300-400 s after SHO+PAL and decreased in the block of 0-100 s after PAS+LEN and SHO+LEN. Conclusions: Our results suggest that spinal excitability is potentiated during a muscle action preceded by muscle shortening, but it becomes depressed during a muscle action preceded by muscle lengthening.

    KW - After-effect

    KW - Contraction history

    KW - H-reflex

    KW - Lengthening contraction

    KW - Shortening contraction

    UR - http://www.scopus.com/inward/record.url?scp=79957943007&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=79957943007&partnerID=8YFLogxK

    U2 - 10.1002/mus.21989

    DO - 10.1002/mus.21989

    M3 - Article

    C2 - 21488052

    AN - SCOPUS:79957943007

    VL - 43

    SP - 851

    EP - 858

    JO - Muscle and Nerve

    JF - Muscle and Nerve

    SN - 0148-639X

    IS - 6

    ER -