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A lightweight prosthetic hand with 19-DOF dexterity and human-level functions.
Nat Commun
January 2025
Institute of Humanoid Robots, School of Engineering Science, University of Science and Technology of China, Hefei, 230026, China.
A human hand has 23-degree-of-freedom (DOF) dexterity for managing activities of daily living (ADLs). Current prosthetic hands, primarily driven by motors or pneumatic actuators, fall short in replicating human-level functions, primarily due to limited DOF. Here, we develop a lightweight prosthetic hand that possesses biomimetic 19-DOF dexterity by integrating 38 shape-memory alloy (SMA) actuators to precisely control five fingers and the wrist.
View Article and Find Full Text PDFAnalysis of lipid profile before and after a simulated Brazilian jiu-jitsu para-sport fight: Multiple case analysis.
Heliyon
January 2025
Federal University of Mato Grosso (UFMT), Cuiabá Campus, Postgraduate Program in Health Sciences (PPGCS), Brazil.
Analysis of energy pathways is useful in helping to understand adaptations to specific sports practices, which vary according to the type of effort and individual characteristics of the athletes. In this sense, this study aimed to describe the physiological changes related to lipid markers in amputee athletes who practice para-sport jiu-jitsu. This is an observational study, which included three male amputee athletes, aged between 41 and 46 years old and with more than 24 months of experience at a professional level.
View Article and Find Full Text PDFLong-term performance and stability of implanted neural interfaces in individuals with lower limb loss.
J Neural Eng
January 2025
Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, United States of America.
High-density nerve cuffs have been successfully utilized to restore somatosensation in individuals with lower-limb loss by interfacing directly with the peripheral nervous system. Elicited sensations via these devices have improved various functional outcomes, including standing balance, walking symmetry, and navigating complex terrains. Deploying neural interfaces in the lower limbs of individuals with limb loss presents unique challenges, particularly due to repetitive muscle contractions and the natural range of motion in the knee and hip joints for transtibial and transfemoral amputees, respectively.
View Article and Find Full Text PDFEvaluating interface pressure in a lower-limb prosthetic socket: Comparison of FEM and experimental measurements on a roll-over simulator.
J Biomech
February 2025
Arts et Métiers Institute of Technology, Université Sorbonne Paris Nord, IBHGC - Institut de Biomécanique Humaine Georges Charpak, HESAM Université, 151 boulevard de l'Hôpital, 75013 Paris, France. Electronic address:
Improper socket fitting in lower-limb prostheses can lead to significant complications, including pain, skin lesions, and pressure ulcers. Current suspension and socket design practices rely predominantly on visual inspection of the residual limb and patient feedback. Monitoring stress distribution at the residual limb/socket interface offers a more objective approach.
View Article and Find Full Text PDFApplication of EMG feedback for hand prosthesis control in high-level amputation: a case study.
Sci Rep
December 2024
Department of Health Science and Technology, Aalborg University, Aalborg, Denmark.
EMG feedback improves force control of a myoelectric hand prosthesis by conveying the magnitude of the myoelectric signal back to the users via tactile stimulation. The present study aimed to test if this method can be used by a participant with a high-level amputation, and whose muscle used for prosthesis control (pectoralis major) was not intuitively related to hand function. Vibrotactile feedback was delivered to the participant's torso, while the control was tested using EMG from three different muscles.
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