Contributions of flexor hallucis longus and brevis muscles to isometric toe flexor force production

• Autorzy: Rowley Michael , Kurihara Toshiyuki , Ortiz-Weissberg David , Kulig Kornelia

Identyfikatory

DOI

10.37190/ABB-02222-2023-02

• Języki publikacji: EN

Abstrakty

EN

Morphological differences between the two primary great toe flexors – flexor hallucis longus (FHL) and flexor hallucis brevis (FHB) – likely drive differences in how these muscles contribute to functional toe flexor torque production. The aim of the study was to investigate FHL and FHB activation in two isometric toe flexion tasks – one called a “toe-pushing” task with the metatarsophalangeal (MTP) joints dorsiflexed and the interphalangeal (IP) joints in neutral and another called a “toe-gripping” task with the MTP joints in neutral and flexed IP joints. Methods: Twenty participants’ FHL and FHB muscles were instrumented with intramuscular electromyography electrodes. Muscle activation was normalized to a maximum voluntary contraction and compared between the two isometric toe flexor force production tasks. Results: Overall, participants utilized these two toe flexors completely differently in the two tasks. In the toe-gripping task, the FHL was activated to a much greater extent than the FHB. In fact, 18 our of 20 participants activated FHL at more than 70% maximum voluntary contraction and half of participants activated FHB at less than 10%. In contrast, muscle activation during the toe-pushing task appeared more reliant on the FHB for most participants. Conclusions: Different contributions from the FHL and FHB to toe flexor force production in these two tasks are potentially driven by differences in muscle functional length among other factors. These findings help to inform the selection of rehabilitation and training exercises meant to preferentially target intrinsic or extrinsic foot musculature.

Słowa kluczowe

EN

intrinsic foot muscles; extrinsic foot muscle; hallux; foot; ankle

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2023
• Tom: Vol. 25, no. 1
• Strony: 91--99
• Opis fizyczny: Bibliogr. 20 poz., rys., tab., wykr.

Twórcy

autor

Rowley Michael

• Department of Kinesiology, California State University East Bay, Hayward, CA, USA
• Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA

autor

Kurihara Toshiyuki

• Department of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga, Japan

autor

Ortiz-Weissberg David

• Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA

autor

Kulig Kornelia

• Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).