P 025 - Lower limb muscles activity during imagination of gait

Kolářová, Barbora; Tomsa, M; Richards, Jennifer C.; Kolář, Petr; Ondráčková, Hana

doi:10.1016/j.gaitpost.2018.06.182

Cited by 1 publication

(1 citation statement)

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“…e choice of either optimization method was somewhat subjective. Skeletal muscles are all random muscles and their contraction process is controlled by subjective consciousness [28,29]. is can lead to poor applicability and reliability of the optimization principles chosen for the calculation.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Muscle Forces of Extrinsic Finger Flexors and Extensors in Flexor Movements with sEMG and Ultrasound

Zheng

Chen

et al. 2022

Mathematical Problems in Engineering

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The coupling relationship between surface electromyography (sEMG) signals and muscle forces or joint moments is the basis for sEMG applications in medicine, rehabilitation, and sports. The solution of muscle forces is the key issue. sEMG and Muscle-Tendon Junction (MTJ) displacements of the flexor digitorum superficialis (FDS), flexor digitorum profundus (FDP), and extensor digitorum (ED) were measured during five sets of finger flexion movements. Meanwhile, the muscle forces of FDS, FDP, and ED were calculated by the Finite Element Digital Human Hand Model (FE-DHHM) driven by MTJ displacements. The results showed that, in the initial position of the flexion without resistance, the high-intensity contraction of the ED kept the palm straight and the FDS was involved. The sEMG-force relationship of FDS was linear during the flexion with resistance, while FDP showed a larger sEMG amplitude than FDS, with no obvious linearity with its muscle forces. sEMG-MTJ displacement relationships for FDS and FDP were consistent with the trend of their own sEMG-force relationships. sEMG of ED decreased and then increased during the flexion with resistance, with no obvious linear relationship with muscle forces. The analysis of the proportion of muscle force and integrated EMG (iEMG) reflected the different activation patterns of FDS and ED.

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Section: Introductionmentioning

confidence: 99%