Article
Chemistry, Analytical
Shuo Wang, Jingjing Zheng, Bin Zheng, Xianta Jiang
Summary: Pattern recognition using sEMG for prosthesis control has been a topic of interest. Current methods rely on sEMG signals during firmly grasped period, but this may cause delay. By studying the changes in grasp classification accuracy during reaching and grasping, we found a period before firmly grasped that can be used for early grasp classification with reduced delay.
Article
Chemistry, Multidisciplinary
Liang Pan, Hui Wang, Pingao Huang, Xuwei Wu, Zihan Tang, Ying Jiang, Shaobo Ji, Jinwei Cao, Baohua Ji, Guanglin Li, Dechang Li, Zhiming Wang, Xiaodong Chen
Summary: Myoelectric control uses electrical signals from voluntary contraction of muscles in an amputee's stump to operate a prosthesis. Precise control requires low-level myoelectric signals, but imbalanced calcium concentration in atrophic skin can distort these signals.
ADVANCED MATERIALS
(2023)
Review
Engineering, Multidisciplinary
Ziming Chen, Huasong Min, Dong Wang, Ziwei Xia, Fuchun Sun, Bin Fang
Summary: Myoelectric control is crucial for prosthetic hands in rehabilitation. Current research focuses on developing myoelectric classifiers and control methods, but limits hand manipulation to simple tasks and neglects complex daily activities. This article reviews recent achievements in intention recognition and control strategy, analyzing challenges and opportunities for functionality-augmented prosthetic hands and user burden reduction.
Article
Multidisciplinary Sciences
Amelie Touillet, Constance Billon-Grumillier, Jonathan Pierret, Pierrick Herbe, Noel Martinet, Isabelle Loiret, Jean Paysant
Summary: This study compared the functionalities, compensatory shoulder movements, and user satisfaction of two prosthetic myoelectric hooks. The results showed that the design and volume of the devices affected shoulder abduction and manual dexterity in transradial amputees. However, there were no significant differences in user satisfaction between the two devices.
Article
Engineering, Biomedical
Michael Wand, Morten B. Kristoffersen, Andreas W. Franzke, Jurgen Schmidhuber
Summary: This study demonstrates that state-of-the-art deep neural networks outperform common baseline approaches in regression-based multi-class proportional myoelectric hand prosthesis control. The neural network mapping is analyzed to explain this superiority.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2022)
Article
Biotechnology & Applied Microbiology
Alexandra A. Portnova-Fahreeva, Fabio Rizzoglio, Ferdinando A. Mussa-Ivaldi, Eric Rombokas
Summary: In the past, linear dimensionality-reduction techniques like Principal Component Analysis have been used for simplifying myoelectric control of high-dimensional prosthetic hands. However, non-linear techniques like Autoencoders have shown better performance in compressing and reconstructing complex hand kinematics data. This study presents a novel Autoencoder-based controller that allows users to control a high-dimensional virtual hand through a low-dimensional space. The results of the validation experiment with four participants indicate that the Autoencoder-based controller has the potential to improve efficiency and accuracy in prosthetic hand control.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Analytical
Hancong Wu, Matthew Dyson, Kianoush Nazarpour
Summary: This study introduces a cost-effective myoelectric control system with wearable electromyogram (EMG) sensors, focusing on home studies with emphasis on robustness, user-friendly control adjustments, and user supports.
Article
Engineering, Multidisciplinary
Yang Bin, Jiang Li, Ge ChuanYang, Cheng Ming, Zhang Jia
Summary: This paper proposes a control strategy using a customized sensor to achieve continuous and stable grasping in prosthetic hands. The sensor measures and controls the distance and force of contact, and the experimental results demonstrate its effectiveness.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2022)
Article
Computer Science, Information Systems
Sandra Marquez-Figueroa, Yuriy S. Shmaliy, Oscar G. Ibarra-Manzano
Summary: This article develops three filters to improve the accuracy and stability of myoelectric prosthetic arm digital proportional control, as well as to extract a smooth near Gaussian MUAP envelope. Experimental results show that these advanced filters significantly enhance performance and reduce torque ripples and electromechanical delays.
Article
Biotechnology & Applied Microbiology
David Boe, Alexandra A. Portnova-Fahreeva, Abhishek Sharma, Vijeth Rai, Astrini Sie, Pornthep Preechayasomboon, Eric Rombokas
Summary: This study compares the effectiveness of PCA, Pose-AE, and Move-AE in processing human gait data, finding that Move-AE performs best in movement classification and individual identification tasks, suggesting that autoencoder is more suitable than PCA for dimensionality reduction of human gait data.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Engineering, Biomedical
Philip P. Vu, Alex K. Vaskov, Christina Lee, Ritvik R. Jillala, Dylan M. Wallace, Alicia J. Davis, Theodore A. Kung, Stephen W. P. Kemp, Deanna H. Gates, Cynthia A. Chestek, Paul S. Cederna
Summary: By implanting electrodes in RPNI and muscles, stable and high amplitude signals can be obtained for long-term prosthetic control. The signal quality remained consistent for up to 276 and 1054 days in P1 and P2 respectively. P2 maintained high accuracy for real-time prosthetic control for 604 days and performed a real-world multi-sequence coffee task with 99% accuracy for 611 days.
JOURNAL OF NEURAL ENGINEERING
(2023)
Article
Computer Science, Information Systems
Nur Afiqah Hashim, Nasrul Anuar Abd Razak, Noor Azuan Abu Osman
Summary: This study compares pick and place activity in real and virtual environments, showing significantly comparable results in individuals with different abilities, with better performance in the virtual environment.
Article
Chemistry, Analytical
Eric D. Wells, Ahmed W. Shehata, Michael R. Dawson, Jason P. Carey, Jacqueline S. Hebert
Summary: This study investigates the impact of utilizing somatotopically accurate feedback stimulation location on myoelectric prosthesis performance, finding that somatotopically-matched feedback can improve task success rate while reducing task timing and task focus metrics.
Article
Engineering, Biomedical
Pranav Mamidanna, Jakob Lund Dideriksen, Strahinja Dosen
Summary: This study explores how different task objectives shape the control policy developed by participants in a prosthesis force-matching task. Participants successfully integrated supplemental prosthesis force feedback to develop both feedforward and feedback control policies, as demanded by the task objectives. Training protocols that encourage the development of combined feedforward and feedback policy are found to be beneficial for prosthesis users.
JOURNAL OF NEURAL ENGINEERING
(2021)
Article
Engineering, Biomedical
Martin A. Garenfeld, Nikola Jorgovanovic, Vojin Ilic, Matija Strbac, Milica Isakovic, Jakob L. Dideriksen, Strahinja Dosen
Summary: The study proposed a novel compact solution for simultaneous recording and stimulation through dynamic blanking of stimulation artefacts. By developing a feedback coding scheme specifically for myoelectric control, it was found that the quality of closed-loop control was preserved in spite of electrotactile stimulation.
JOURNAL OF NEUROENGINEERING AND REHABILITATION
(2021)
Article
Engineering, Biomedical
Dario Farina, Ivan Vujaklija, Rickard Branemark, Anthony M. J. Bull, Hans Dietl, Bernhard Graimann, Levi J. Hargrove, Klaus-Peter Hoffmann, He (Helen) Huang, Thorvaldur Ingvarsson, Hilmar Bragi Janusson, Kristleifur Kristjansson, Todd Kuiken, Silvestro Micera, Thomas Stieglitz, Agnes Sturma, Dustin Tyler, Richard F. Ff Weir, Oskar C. Aszmann
Summary: This Perspective discusses the development and clinical application of high-performance bionic limbs, emphasizing the use of different technologies, such as osseointegration, neural signal amplification, and muscle sensors, to create better performing bionic limbs.
NATURE BIOMEDICAL ENGINEERING
(2023)
Article
Rehabilitation
Timothy Hasenoehrl, Stefano Palma, Dominikus F-X Huber, Stefan Kastl, Margarete Steiner, Galateja Jordakieva, Richard Crevenna
Summary: Post-COVID exercise intervention improved physical fitness, psychological outcomes, and workability in healthcare workers. Cases with severe fatigue showed higher benefit levels compared to those with mild symptoms. The safe and highly feasible 30secSTS correlated well with physical and mental outcomes and better workability in COVID-19 survivors.
DISABILITY AND REHABILITATION
(2023)
Article
Immunology
Daniela Sieghart, Claudia A. Hana, Helmuth Haslacher, Thomas Perkmann, Leonhard X. Heinz, Clemens Fedrizzi, Karolina Anderle, Ursula Wiedermann, Irina Condur, Susanne Drapalik, Helmut Steinbrecher, Daniel Mrak, Patrick Mucher, Timothy Hasenoehrl, Andrej Zrdavkovic, Barbara Wagner, Stefano Palma, Galateja Jordakieva, Anselm Jorda, Christa Firbas, Angelika Wagner, Nadja Haiden, Felix Bergmann, Richard Crevenna, Markus Zeitlinger, Michael Bonelli, Daniel Aletaha, Helga Radner
Summary: This multicenter study found vaccine-dependent effects of age and time since full immunization on humoral immune response. The findings highlight the importance of individualized vaccine selection, especially in elderly individuals.
CLINICAL INFECTIOUS DISEASES
(2023)
Article
Infectious Diseases
Helga Radner, Daniela Sieghart, Anselm Jorda, Clemens Fedrizzi, Timothy Hasenoehrl, Andrej Zdravkovic, Monika Redlberger-Fritz, Elisabeth Puchammer-Stoeckl, Karolina Anderle, Felix Bergmann, Christa Firbas, Galateja Jordakieva, Barbara Wagner, Helmuth Haslacher, Thomas Perkmann, Leonhard X. Heinz, Michael Bonelli, Richard Crevenna, Daniel Aletaha, Markus Zeitlinger
Summary: This study aimed to investigate the immunogenicity and safety of BNT162b2 booster vaccination with or without a tetravalent influenza vaccine. The results showed that the antibody levels were high and the safety was good in individuals who received BNT162b2 booster vaccination only. However, the immunogenicity was reduced when the BNT162b2 booster vaccine was combined with a tetravalent influenza vaccine. Further studies on new influenza variants and vaccine effectiveness differences are needed.
CLINICAL MICROBIOLOGY AND INFECTION
(2023)
Article
Engineering, Biomedical
Markus Nowak, Ivan Vujaklija, Agnes Sturma, Claudio Castellini, Dario Farina
Summary: This study introduces a system for intuitive simultaneous control of multiple degrees of freedom in the hand and wrist based on EMG signals. By training a regression model, the system is able to accurately capture amplitude information and predict dynamic movements. The results show that the system can effectively control the hand and wrist in able-bodied individuals and even amputees, highlighting its translational potential for prosthetic control.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2023)
Review
Orthopedics
Aidan D. D. Roche, Zachary K. K. Bailey, Michael Gonzalez, Philip P. P. Vu, Cynthia A. A. Chestek, Deanna H. H. Gates, Stephen W. P. Kemp, Paul S. S. Cederna, Max Ortiz-Catalan, Oskar C. C. Aszmann
Summary: Replacing human hand function with prostheses requires not only motor control but also natural sensory feedback. Currently, there is no single solution to restore sensory feedback, but animal models and early human studies have shown some improvements in prosthetic control. Further work is needed to reproduce these results and increase the availability of advanced closed loop prostheses with sensory feedback.
JOURNAL OF HAND SURGERY-EUROPEAN VOLUME
(2023)
Article
Surgery
Konstantin D. Bergmeister, Hannes Platzgummer, Gerda Reichel-Vacariu, Thomas Kretschmer, Agnes Sturma, Dirk Schaefer, Konrad Mende, Guenther Meissl, Ingrid Schlenz, Oskar C. Aszmann, Matthias Rab
Summary: In this position paper, the German-Speaking Group for Microsurgery of Peripheral Nerves and Vessels (DAM) discusses the current evidence on perioperative diagnostics for traumatic peripheral nerve lesions or compression syndromes. The paper evaluates the importance of clinical examinations, electrophysiology, nerve ultrasound, and magnetic resonance neurography, based on a consensus workshop held in Graz, Austria.
HANDCHIRURGIE MIKROCHIRURGIE PLASTISCHE CHIRURGIE
(2023)
Article
Engineering, Biomedical
Ivan Vujaklija, Moon Ki Jung, Timothy Hasenoehrl, Aidan D. Roche, Agnes Sturma, Silvia Muceli, Richard Crevenna, Oskar C. Aszmann, Dario Farina
Summary: Objective clinical evaluation tests for prosthetic users primarily focus on task completion speed and do not consider compensatory motions. Subjective observations on motion quality have been introduced, but they are influenced by examiner opinions and are difficult to standardize and compare. This study aims to objectively quantify body compensations in myoelectric prosthetic users and assess the effectiveness of current clinical scores.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2023)
Article
Surgery
Gregor Laengle, Andreas Gohritz, Udo Maierhofer, Agnes Sturma, Anna Boesendorfer, Clemens Gstoettner, Hannes Platzgummer, Oskar Aszmann
Summary: This report highlights the occurrence of intractable co-contraction as a significant adverse event of distal nerve transfers and presents a case of its treatment.
Article
Oncology
Richard Crevenna, Timothy Hasenoehrl, Christoph Wiltschke, Franz Kainberger, Mohammad Keilani
Summary: Some cancer patients are at increased risk of fractures and should receive exercise recommendations that consider their individual musculoskeletal situation. Austrian experts suggest a multidisciplinary approach, where each patient is managed by a medical case manager and assessed by specialists in radiology, oncology, orthopedics, and radiation therapy. Exercise planning should be based on the individual's fracture risk assessment, and additional physical treatment may be prescribed for patients with limitations.
Article
Health Care Sciences & Services
Andreas Gohritz, Gregor Laengle, Anna Boesendorfer, Bernhard Gesslbauer, Clemens Gstoettner, Olga Politikou, Agnes Sturma, Oskar C. C. Aszmann
Summary: We present a series of patients aged over 60 who underwent nerve reconstruction using nerve transfers, and show that this method is effective in restoring muscle strength and arm function in older patients, contradicting previous literature.
JOURNAL OF PERSONALIZED MEDICINE
(2023)