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Effects of forearm rotation on wrist flexor and extensor muscle activities.
J Orthop Surg Res
January 2025
Department of Orthopedic Surgery, Tokyo Medical University Ibaraki Medical Center, Ami-Town, Ibaraki-Pref., Japan.
The forearm muscles coordinately control wrist motion, and their activity is affected by forearm rotation. Although forearm rotation has been implicated in the development of lateral and medial epicondylitis, its biomechanical background remains unknown. Therefore, the present study investigated the activity of wrist muscles in various forearm positions.
View Article and Find Full Text PDFAnkle muscle strength and activation are associated with walking patterns in preschool and school-age children.
PLoS One
January 2025
Faculty of Sport Sciences, Waseda University, Saitama, Japan.
Walking patterns can differ between children and adults, both kinematically and kinetically. However, the detailed nature of the ankle pattern has not been clarified. We investigated musculature, biomechanics, and muscle activation strategies and their relevance to walking performance in preschool (PS) and school children (SC), with adults (AD) as reference.
View Article and Find Full Text PDFTrunk muscle behaviors during the full-cycle stoop and squat lifting tasks.
PeerJ
January 2025
Department of Orthopedics, Xuanwu Hospital Capital Medical University, Beijing, China.
Background: Lifting is generally considered as a risk factor for low back pain. A thorough investigation of the muscle function during lifting is essential for a better assessment of the potential risk of muscle impairment and towards improvements in lifting strategy. We aimed to compare the activities of the trunk muscles between the stoop and the squat lifting tasks.
View Article and Find Full Text PDFElectrical cutaneous stimulation of the foot sole does not enhance rate of torque development during maximal effort isometric plantarflexion in females.
J Electromyogr Kinesiol
February 2025
Department of Human Health and Nutritional Sciences, University of Guelph, 50 Stone Road E, Guelph, ON N1G 2W1, Canada. Electronic address:
Rate of torque development (RTD) measures how rapidly one can generate torque and is crucial for balance and athletic performance. Fast RTD depends on the rapid recruitment of high threshold motor units (MUs). Cutaneous electrical stimulation has been shown to alter MU excitability, favoring high threshold MUs via reduced recruitment thresholds.
View Article and Find Full Text PDFHighly Responsive Robotic Prosthetic Hand Control Considering Electrodynamic Delay.
Sensors (Basel)
December 2024
Department of Robotics and Mechatronics, Tokyo Denki University, Tokyo 120-8551, Japan.
As robots become increasingly integrated into human society, the importance of human-machine interfaces continues to grow. This study proposes a faster and more accurate control system for myoelectric prostheses by considering the Electromechanical Delay (EMD), a key characteristic of Electromyography (EMG) signals. Previous studies have focused on systems designed for wrist movements without attempting implementation.
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