H-reflex in abductor hallucis and postural performance between flexible flatfoot and normal foot
| Autor: | Li Wei Chou, Yi-Ju Tsai, Yu-Jen Chen, Cheng Ya Huang, Tzu Hui Huang, Shun Wa Wei |
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| Rok vydání: | 2019 |
| Předmět: |
Adult
Male medicine.medical_specialty Physical Therapy Sports Therapy and Rehabilitation Normal foot H-Reflex 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Center of pressure (terrestrial locomotion) Humans Medicine Orthopedics and Sports Medicine Abductor hallucis muscle Stretch reflex Muscle Skeletal Postural Balance 030222 orthopedics Electromyography business.industry Abductor hallucis 030229 sport sciences General Medicine Flatfoot Cross-Sectional Studies medicine.anatomical_structure Case-Control Studies Reflex Female H-reflex business Flexible Flatfoot |
| Zdroj: | Physical Therapy in Sport. 37:27-33 |
| ISSN: | 1466-853X |
| Popis: | Morphological changes of the abductor hallucis muscle (AbH) in flexible flatfoot (FF) individuals influence regulations of the medial longitudinal arch (MLA). Prolonged and repeated stretching of AbH in flexible flatfoot may cause changes in muscle reflex properties and further influence postural performance. However, AbH muscle reflex under different postural conditions have never been examined. The purpose of this study was to investigate differences in AbH H-reflex and postural performance between individuals with normal foot (NF) alignment and FF under prone, double-leg stance (DLS), and single-leg stance (SLS) conditions.Cross-sectional study.University laboratory.Individuals with FF (n = 12) and NF (n = 12).AbH H-reflex, AbH EMG and center of pressure (CoP) displacement.Under all postural conditions, AbH H-reflex was significantly lower in the FF group (P .05). Under the SLS condition, AbH EMG was significantly higher in the FF group (P .05), and CoP displacement for the medial-lateral and anterior-posterior directions were significantly higher in the FF group (P .05).With increased postural demand, FF individuals maintained their postural stability by recruiting greater AbH activities than through automatic stretch reflex, but FF individuals still showed inferior posture stability. |
| Databáze: | OpenAIRE |
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