Evaluation of the activities of the medial and lateral heads of quadratus plantae in flexion movements of the lateral four toes using ultrasound real-time tissue elastography
| Autor: | Hideto Kanzaki, Tadaki Koseki, Takuya Sato, Yoshiro Kiyoshige, Tatsuya Nakanowatari |
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| Rok vydání: | 2018 |
| Předmět: |
Male
musculoskeletal diseases 0301 basic medicine Muscle Strength Dynamometer Young Adult 03 medical and health sciences 0302 clinical medicine medicine Quantitative assessment Foot muscles Humans Pronation Orthopedics and Sports Medicine Range of Motion Articular Podiatry Elasticity (economics) Muscle Skeletal medicine.diagnostic_test business.industry Muscle elasticity Ultrasound Healthy subjects 030229 sport sciences Anatomy Toes Healthy Volunteers body regions Elasticity Imaging Techniques Female 030101 anatomy & morphology Elastography Quadratus plantae business |
| Zdroj: | The Foot. 36:25-29 |
| ISSN: | 0958-2592 |
| DOI: | 10.1016/j.foot.2018.02.005 |
| Popis: | Quadratus plantae (QP), one of the plantar intrinsic foot muscles, assist plantarflexion of the lesser toes. QP has medial and lateral muscle heads with different anatomical structures. The two heads of this muscle may have different roles in foot function. Ultrasound real-time tissue elastography (RTE) measurements have allowed quantitative assessment of deep-layer muscle elasticity. The purpose of this study was to determine the activity of the QP in flexion movements of the lateral four toes using RTE. Thirteen healthy subjects performed maximal voluntary contractions using a hand-held dynamometer with external belt fixation for each toe flexion movement. The elasticity of the muscles were measured using RTE during rest and flexion of each toe. The strain ratio of the muscle to that in an acoustic coupler was calculated as an index of muscle elasticity. Higher strain ratio values imply lower elasticity. The strain ratio of the medial head of QP for second toe flexion (0.10 ± 0.11) was significantly stiffer than at rest (0.34 ± 0.33). The strain ratios of the lateral head of QP for flexion of the second (0.32 ± 0.19), third (0.41 ± 0.37), fourth (0.33 ± 0.26), and fifth (0.45 ± 0.39) toes were significantly stiffer than at rest (1.02 ± 0.68). These results suggest that the medial head of QP has a role in assisting second-toe flexion, and the lateral head has a role in assisting flexion of all four lateral toes. |
| Databáze: | OpenAIRE |
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