Article
Neurosciences
Anuj Ojha, Gordon Alderink, Samhita Rhodes
Summary: This study examined the neural correlations during muscle activation related to balance. The results showed greater coherence between muscle pairs in the same leg and in lower frequency bands. The coherence between different muscle pairs was higher in less stable positions. The findings suggest that coherence between EMG signals can be used as an independent indicator of the neural correlates for stability.
FRONTIERS IN HUMAN NEUROSCIENCE
(2023)
Article
Engineering, Biomedical
Tatiana D. Luna, Victor Santamaria, Isirame Omofuma, Moiz I. Khan, Sunil K. Agrawal
Summary: The study used RobUST to deliver trunk perturbations and pelvic assistive support in 10 healthy adults, showing that pelvic support could reduce kinematic and COP excursions during standing without decreasing muscle activity or ground reaction forces. The highest level of postural stability was observed when participants used a handrail and received pelvic assistive forces.
IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING
(2021)
Review
Neurosciences
Eiji Yamanaka, Yuki Horiuchi, Ippei Nojima
Summary: This study aimed to conduct a systematic literature review on EMG-EMG coherence during standing tasks and summarize previous studies comparing EMG-EMG coherence between healthy young and elderly adults. The results showed that EMG-EMG coherence could identify differences in standing control between healthy young and elderly adults, although the methodology was highly heterogeneous. The conclusion is that EMG-EMG coherence may help elucidate changes in standing control with age and should be used in participants with central nervous system disorders in future studies to better understand the characteristics of standing balance disabilities.
FRONTIERS IN NEUROSCIENCE
(2023)
Article
Engineering, Biomedical
Desiderio Cano Porras, Jesse V. Jacobs, Rivka Inzelberg, Yotam Bahat, Gabriel Zeilig, Meir Plotnik
Summary: This study investigates the impact of vertical and horizontal perturbations on muscle activation patterns, finding that vertical perturbations result in longer onset latencies, shorter durations of activation, and lower activation magnitudes compared to horizontal perturbations. The availability of visual input appears to affect response efficiency, with incongruent visual input potentially adversely affecting response triggering.
JOURNAL OF NEUROENGINEERING AND REHABILITATION
(2021)
Article
Multidisciplinary Sciences
Ashirbad Pradhan, Jiayuan He, Ning Jiang
Summary: This longitudinal database collects forearm and wrist sEMG data from 43 participants over three days, which can be used for the development of robust machine learning algorithms for HGR and biometric applications.
Article
Multidisciplinary Sciences
Changcheng Wu, Qingqing Cao, Fei Fei, Dehua Yang, Baoguo Xu, Guanglie Zhang, Hong Zeng, Aiguo Song
Summary: This study introduces a method based on analysis of variance and generalized regression neural network for optimizing measurement positions and features in grasp force estimation to improve accuracy. The experiment identifies the optimal combination of measurement positions and features, providing important insights for future prosthetic hand control.
Article
Biotechnology & Applied Microbiology
F. C. Krafft, M. Herzog, T. Stein, L. H. Sloot
Summary: This study examined the effects of rollator support on posture and stability during standing up and sitting down. The results showed that full rollator support improved movement stability without slowing down the movement, leading to a more upright standing posture.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Engineering, Biomedical
Hend ElMohandes, Seif Eldawlatly, Josep Marcel Cardona Audi, Roman Ruff, Klaus-Peter Hoffmann
Summary: This study proposes an EMG-based multi-Kalman filter approach to decode arm kinematics, specifically the elbow angle, wrist joint horizontal and vertical positions. The results demonstrate the efficacy of the proposed approach, achieving good performance when training and testing with the same-subject data, and indicating the possibility of obtaining a subject-independent decoder.
BIOMEDICAL ENGINEERING ONLINE
(2022)
Article
Audiology & Speech-Language Pathology
A. Zarowski, M. C. Fuentes, D. Schaudel, M. Leblans, L. De Coninck, T. Theunen, A. Vermeiren, L. Verschoren, J. van Dinther, E. F. Offeciers
Summary: After surgical implantation of a cochlear implant, individualized programming can be achieved through stapedius reflex measurement instead of behavioral measurements. Research showed a high preservation rate of stapedius reflex postoperatively in adult subjects with single sided deafness at 1- and 6-months after surgery.
Article
Engineering, Biomedical
Annemijn H. Jonkman, Ricardo Juffermans, Jonne Doorduin, Leo M. A. Heunks, Jaap Harlaar
Summary: The accuracy of EMGdi parameters in critically ill ICU patients can be compromised by ECG interference in the signal. A new Estimated ECG Subtraction (EES) method was designed to address this issue and was found to be more effective than using a wavelet-based adaptive filter alone, potentially improving diaphragm activity monitoring and control in clinical practice.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2021)
Article
Engineering, Biomedical
Sacha Zeronian, Frederic Noe, Thierry Paillard
Summary: Differences in knee angle were observed between excitomotor stimulation and the other conditions, suggesting a slight knee extension without affecting balance control during a monopedal postural task. Overall, neither somatosensory nor excitomotor stimulation had a significant impact on postural balance in this study.
MEDICAL ENGINEERING & PHYSICS
(2021)
Article
Clinical Neurology
John C. McHugh, Eileen O'Flaherty, Nicole Daly
Summary: This study examined the predictability of test outcomes based on the specificity of referrals for pediatric electrodiagnostic testing (EDX). The results showed that the specificity of referrals was related to referral accuracy and abnormal test outcomes. Lack of specified pre-test diagnosis or the primary symptom being pain decreased the likelihood of abnormal test outcomes.
Article
Multidisciplinary Sciences
Felipe Fava de Lima, Cristiano Rocha Silva, Andre Fabio Kohn
Summary: Transcutaneous spinal direct current stimulation (tsDCS) is a non-invasive technique that can modulate neural circuits in the central nervous system. However, it does not have a significant effect on postural sway during quiet standing in young healthy individuals.
Article
Biophysics
Carlos De la Fuente, Eduardo Martinez-Valdes, Emmanuel S. da Rocha, Jeam M. Geremia, Marco A. Vaz, Felipe P. Carpes
Summary: Structural alterations of the triceps surae and Achilles tendon following a repair surgery can lead to plantarflexion weakness and influence the activation strategies of the Gastrocnemius Medialis (GM) muscle. This study aimed to investigate the spatial activation patterns of GM in patients with persistent plantar flexion weakness one-year post-surgery. The results showed increased distal overactivation in GM in patients with persistent weakness, indicating altered activation patterns in this muscle group following Achilles tendon repair.
JOURNAL OF BIOMECHANICS
(2023)
Article
Neurosciences
Obaid U. Khurram, Francesco Negro, C. J. Heckman, Christopher K. Thompson
Summary: In this study, the discharge rate difference (Delta F) of lower threshold motor units at the recruitment onset and offset of higher threshold motor units was found to be similar between standing and seated conditions in human tibialis anterior motor units, suggesting similar neuromodulatory drive for these two upright postures. The use of high-density EMG arrays for real-time muscle activity feedback during standing ramped contraction tasks was also validated, demonstrating the effectiveness of the paired motor unit analysis technique in these conditions.
JOURNAL OF NEUROPHYSIOLOGY
(2021)
Article
Neurosciences
Sofia Dall'Orso, Tomoki Arichi, Sean P. Fitzgibbon, A. David Edwards, Etienne Burdet, Silvia Muceli
Summary: Study shows that functional connectivity between limb regions in the sensorimotor cortex is already present in preterm infants, and it strengthens with age until reaching an adult-like configuration. These changes are specific to the sensorimotor network and are more dependent on age rather than age of birth.
HUMAN BRAIN MAPPING
(2022)
Article
Engineering, Biomedical
Moon Ki Jung, Silvia Muceli, Camila Rodrigues, Alvaro Megia-Garcia, Alejandro Pascual-Valdunciel, Antonio J. Del-Ama, Angel Gil-Agudo, Juan C. Moreno, Filipe Oliveira Barroso, Jose L. Pons, Dario Farina
Summary: This study compared the performance of surface EMG and intramuscular EMG in estimating the required joint torques for assistive devices. The results showed that there was a similar correlation between the experimental and predicted joint torques when using either surface or intramuscular EMG as input signals in both healthy individuals and SCI patients.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2022)
Article
Engineering, Biomedical
G. L. Cerone, A. Giangrande, M. Ghislieri, M. Gazzoni, H. Piitulainen, A. Botter
Summary: This study describes the design and validation of a new fully wireless body sensor network for the integrated acquisition of EEG and HD-sEMG signals. The proposed device represents an advancement in technology and allows for the study of sensorimotor integration. The system was characterized in terms of synchronization accuracy and signal quality, and compared to a wired benchmark device.
IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING
(2022)
Article
Medicine, General & Internal
Marco Alessandro Minetto, Maria Giulia Ballatore, Alberto Botter, Chiara Busso, Angelo Pietrobelli, Anita Tabacco
Summary: The present study aimed to investigate age-related changes in total body skeletal muscle mass (TBSMM) and lean mass asymmetry in a large sample of adults. The findings revealed a gradual decline in TBSMM with age and a higher level of muscle mass asymmetry in males and lower limbs. These findings have clinical significance for assessing muscle quantity and distribution.
JOURNAL OF CLINICAL MEDICINE
(2022)
Review
Physiology
Kevin E. Power, Evan J. Lockyer, Alberto Botter, Taian Vieira, Duane C. Button
Summary: This article discusses the changes in electrical properties of spinal motoneurons under chronic and acute conditions and their potential impact on locomotor output. It also explores the feasibility of using high-density surface electromyogram recordings to indirectly study motoneuron excitability.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2022)
Review
Chemistry, Analytical
Isabella Campanini, Andrea Merlo, Catherine Disselhorst-Klug, Luca Mesin, Silvia Muceli, Roberto Merletti
Summary: Surface electromyography (sEMG) has been extensively researched, but its clinical applications are limited. This study provides teaching tools using analogies and simulations, such as physical and mathematical models, to explain sEMG detection with electrode pairs and grids. The study summarizes the basic mechanisms of sEMG generation and illustrates the features of the sensing system through examples. It also discusses the various applications of sEMG in different fields.
Article
Multidisciplinary Sciences
Marco Carbonaro, Kristen M. Meiburger, Silvia Seoni, Emma F. Hodson-Tole, Taian Vieira, Alberto Botter
Summary: This study proposes a method to assess the electrical and physical properties of single motor units (MUs) by combining high-density surface electromyography (HDsEMG) and ultrafast ultrasonography (US). The method was tested and the results showed the feasibility of identifying MU displacement areas and the correlation between action potential distribution and displacement area. This approach has the potential to non-invasively assess the properties of single MUs in voluntary contractions.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Biomedical
Mehdi Shirzadi, Hamid R. R. Marateb, Kevin C. C. McGill, Silvia Muceli, Miguel A. A. Mananas, Dario Farina
Summary: This article presents a new algorithm for resolving superimposed action potentials that overlap in time, and it was tested on muscular and neural recordings. The algorithm outperformed other methods in terms of accuracy and efficiency on simulated and experimental datasets. It shows promise for real-time neural decoding and interfacing.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2023)
Article
Neurosciences
Daniel B. Free, Ian Syndergaard, Adam C. Pigg, Silvia Muceli, Johanna Thompson-Westra, Karin Mente, Carine W. Maurer, Dietrich Haubenberger, Mark Hallett, Dario Farina, Steven K. Charles
Summary: Although there are limited treatment options for essential tremor (ET), peripheral tremor suppression methods have shown potential. This study aimed to quantify the relationships between tremor activity in muscles throughout the upper limb. Muscle activity was recorded from 15 major upper limb muscles in subjects with ET, and coherence and phase difference between muscle pairs were calculated. The results showed that patients had significantly more coherence than control subjects, particularly among agonists.
JOURNAL OF NEUROPHYSIOLOGY
(2023)
Article
Multidisciplinary Sciences
Silvia Muceli, Wigand Poppendieck, Ales Holobar, Simon Gandevia, David Liebetanz, Dario Farina
Summary: Invasive electromyography has provided a new approach to study the behavior of motoneurons in vivo. However, the limitation of this technique is the inability to concurrently detect a large number of active motoneurons, which hinders population analysis in natural tasks. In this study, a high-density intramuscular electrode and a fully automatic methodology were developed to detect action potential discharges of up to 67 concurrently active motoneurons with 99% accuracy. The findings revealed the common synaptic input and inhibitory behavior of motoneurons in the same pool, which is a significant contribution to the analysis of the human motor system in vivo.
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
Physiology
Mehdi Shirzadi, Hamid Reza Marateb, Monica Rojas-Martinez, Marjan Mansourian, Alberto Botter, Fabio Vieira dos Anjos, Taian Martins Vieira, Miguel Angel Mananas
Summary: This article introduces a new real-time convex and interpretable model for solving the sEMG-force estimation problem and validates its applications on upper and lower limb. The performance of the proposed method is statistically compared with 13 other methods, including linear-in-the-parameter models, Artificial Neural Networks, and Supported Vector Machines. The results show that the proposed method outperforms other methods and has no significant difference compared to the recorded force signal.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Engineering, Biomedical
Robin Rohlen, Marco Carbonaro, Giacinto L. Cerone, Kristen M. Meiburger, Alberto Botter, Christer Gronlund
Summary: This study examined the repeatability of ultrasound images in distinguishing muscle motor units (MUs) from noise in low-force isometric contractions. It was found that the repeatable components accounted for about one-third of the MUs and can be used for data reduction.
JOURNAL OF NEURAL ENGINEERING
(2023)
Article
Engineering, Biomedical
Taian M. Vieira, Giacinto Luigi Cerone, Alberto Botter, Kohei Watanabe, Andrew D. Vigotsky
Summary: The value of surface electromyograms lies in their potential to non-invasively probe the neuromuscular system. This study provides evidence that the inter-electrode distance imposes a biophysical constraint on the sensitivity of bipolar EMGs for muscle excitation. The results suggest that excessively reducing the inter-electrode distance limits the physiological content of EMGs and hampers validity.
IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING
(2023)
Article
Engineering, Biomedical
Gonthicha Puttaraksa, Silvia Muceli, Deren Y. Barsakcioglu, Ales Holobar, Alexander Kenneth Clarke, Steven K. Charles, Jose L. Pons, Dario Farina
Summary: This study proposes an online tremor phase and frequency tracking technique for the customized control of electrical stimulation. It uses a phase-locked loop system to estimate the neural drive to muscles and track the phase differences between muscle groups during tremor. The feasibility of real-time estimation of the phase of tremorogenic neural drive to muscles is demonstrated, providing a methodology for future tremor-suppression neuroprostheses.
IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING
(2022)