A5007124393- Muscle activation and electromyography studies
- Neuroscience and Neural Engineering
- EEG and Brain-Computer Interfaces
- Advanced Sensor and Energy Harvesting Materials
- Motor Control and Adaptation
- Transcranial Magnetic Stimulation Studies
- Spinal Cord Injury Research
- Neurological disorders and treatments
- Nerve Injury and Rehabilitation
- Prosthetics and Rehabilitation Robotics
- Stroke Rehabilitation and Recovery
- Conducting polymers and applications
- Pain Management and Treatment
- Tactile and Sensory Interactions
- Neural dynamics and brain function
- Vagus Nerve Stimulation Research
- Advanced Memory and Neural Computing
- Cerebral Palsy and Movement Disorders
- Functional Brain Connectivity Studies
- Innovative Energy Harvesting Technologies
- Gaze Tracking and Assistive Technology
- Urinary Bladder and Prostate Research
- Hand Gesture Recognition Systems
- Musculoskeletal pain and rehabilitation
- Embedded Systems Design Techniques
Université de Montpellier
2015-2024
Institut national de recherche en informatique et en automatique
2015-2024
Laboratoire d'Informatique, de Robotique et de Microélectronique de Montpellier
2012-2022
Centre National de la Recherche Scientifique
2011-2022
COMUE Languedoc-Roussillon Universités
2018
Centre Hospitalier Universitaire de Montpellier
2015
Institut de Recherche en Informatique et Systèmes Aléatoires
2015
Centre de Recherche en Informatique
2008-2014
Centre Occitanie-Montpellier
2011
National Institute of Informatics
2011
Recreated missing leg sensations, connected to the prosthesis sensors, restored functional abilities and promoted its cognitive integration.
Objective Hand amputation is a highly disabling event, which significantly affects quality of life. An effective hand replacement can be achieved if the user, in addition to motor functions, provided with sensations that are naturally perceived while grasping and moving. Intraneural peripheral electrodes have shown promising results toward restoration sense touch. However, long‐term usability clinical relevance intraneural sensory feedback not yet been clearly demonstrated. Methods To this...
We present the results of a 5-year patient follow-up after implantation an original neuroprosthesis. The system is able to stimulate both epimysial and neural electrodes in such way that complete flexor–extensor chain lower limb can be activated without using withdrawal reflex. demonstrate standing assisted walking are possible, have remained stable for 5 years. Nevertheless, some problems were noted, particularly regarding muscle response on channels. Analysis electrical behaviour...
One of the challenging issues in computational rehabilitation is that there a large variety patient situations depending on type neurological disorder. Human characteristics are basically subject specific and time variant; for instance, neuromuscular dynamics may vary due to muscle fatigue. To tackle such specificity time-varying characteristics, robust bio-signal processing precise model-based control which can manage nonlinearity variance system, would bring break-through new modality...
Although peripheral nerve stimulation using intraneural electrodes has been shown to be an effective and reliable solution restore sensory feedback after hand loss, there have no reports on the characterization of multi-channel stimulation. A deeper understanding how simultaneous multiple electrode channels affects evoked sensations should help in improving definition encoding strategies for bidirectional prostheses. We characterized by median ulnar nerves (multi-channel configuration) four...
This study investigates a torque estimation method for muscle fatigue tracking, using stimulus evoked electromyography (eEMG) in the context of functional electrical stimulation (FES) rehabilitation system.Although FES is able to effectively restore motor function spinal cord injured (SCI) individuals, its application inevitably restricted by fatigue.In addition, sensory feedback indicating missing such patients.Therefore, essential provide or feedforward signal adaptive control.In this...
Micro-fabricated neural interfaces based on polyimide (PI) are achieving increasing importance in translational research. The ability to produce well-defined micro-structures with properties that include chemical inertness, mechanical flexibility and low water uptake key advantages for these devices.This paper reports the development of transverse intrafascicular multichannel electrode (TIME) used deliver intraneural sensory feedback an upper-limb amputee combination a sensorized hand...
We present a new system for functional electrical stimulation (FES) applications based on networked units. They embed an advanced analog circuit, which provides multipolar and multiphasic profiles, digital circuits, ensure safety, locally executed programmed communication with the master controller. This architecture is thus distributed units (DSU) that need only two-wire bus to communicate, regardless of number poles each DSU-driven electrode. structure minimizes required bandwidth between...
Experience of an implanted functional electrical stimulation neuroprosthesis (FES) associating 8-channel epimysial and 4-channel neural stimulations. The primary objective consisted in presenting clinical technological experiences based on a 9-year follow-up one patient with this FES device. secondary assessing resulting benefits. One recruited 1996 within the European Stand Up Walk Project benefited from evaluations. was still using system nine years later making unique case, even when...
The goal of this paper is to propose a model-based control design framework, adapted the development modules for medical devices. A particular example presented in which instantaneous heart rate regulated real-time, by modulating, an adaptive manner, current delivered vagus nerve neuromodulator.The proposed framework couples module, based on classical PI controller, mathematical model device, and physiological representing cardiovascular responses stimulation (VNS). In order analyze evaluate...
Multipolar cuff electrode can selectively stimulate areas of peripheral nerves and therefore enable to control independent functions. However, the branching fascicularization are known for a limited set specific organization remains subject-dependent. This paper presents general modeling optimization methods in context multipolar stimulation using without priori knowledge nerve structure. Vagus experiments based on results were then investigated.The model consisted two components: lead field...
EMG-to-force estimation based on muscle models, for voluntary contraction has many applications in human motion analysis. The so-called Hill model is recognized as a standard this practical use. However, it phenomenological whereby activation, force-length and force-velocity properties are considered independently. Perreault reported modeling errors were large different firing frequencies, level of activation speed contraction. It may be due to the lack coupling between properties. In paper,...
In paraplegic patients with upper motor neuron lesions the signal path from central nervous system to muscles is interrupted. Functional Electrical Stimulation (FES) applied lower neurons can replace lacking signals. A neuroprosthesis may be used restore function in on basis of FES. The neuroprosthesic implant allows controlled high accuracy, selectivity and repeatability muscle's response achieved. SUAW project succeeded implantation an advanced neuroprosthetic device two patients, but...
Functional electrical stimulation (FES) is a neuroprosthetic technique for restoring lost motor function of spinal cord injured (SCI) patients and motor-impaired subjects by delivering short pulses to their paralyzed muscles or nerves. FES induces action potentials respectively on nerves so that muscle activity can be characterized the synchronous recruitment units with its compound electromyography (EMG) signal called M-wave. The recorded evoked EMG (eEMG) employed predict resultant joint...
Functional electrical stimulation (FES) is a neuroprosthetic technique to help restore motor function of spinal cord-injured (SCI) patients. Through delivery pulses muscles motor-impaired subjects, FES able artificially induce their muscle contractions. Evoked electromyography (eEMG) used record such FES-induced activity and presents form [Formula: see text]-wave. In order monitor under ensure safe configurations, closed-loop control with eEMG feedback needed be developed for SCI patients...
This paper introduces a new human-machine interface for individuals with tetraplegia. We investigated the feasibility of piloting an assistive device by processing supra-lesional muscle responses online. The ability to voluntarily contract set selected muscles was assessed in five spinal cord-injured subjects through electromyographic (EMG) analysis. Two were also asked use EMG control palmar and lateral grasping robot hand. different modalities assessed. These preliminary results open way...
We hypothesized that a selective neural electrical stimulation of radial and median nerves enables the activation functional movements in paralyzed hand individuals with tetraplegia. Compared to previous approaches for which up 12 muscles were targeted through individual muscular stimulations, we focused on minimizing number implanted electrodes however providing almost all needed useful subjects complete tetraplegia.We performed acute experiments during scheduled surgeries upper limb...
Abstract Individuals with complete cervical spinal cord injury suffer from a permanent paralysis of upper limbs which prevents them achieving most the activities daily living. We developed neuroprosthetic solution to restore hand motor function. Electrical stimulation radial and median nerves by means two epineural electrodes enabled functional movements paralyzed hands. demonstrated in participants tetraplegia that selective nerve fascicles optimized spreading current over active contacts...
Abstract The purpose of the study was to examine time course neuromuscular fatigue components during a low‐frequency electrostimulation (ES) session. Three bouts 17 trains stimulation at 30 H Z (4 s on, 6 off) were used electrically induce in plantar flexor muscles. Before and after every 17‐train bout, torque, electromyographic activity [expressed as root mean square (RMS) median frequency (MF) values], evoked potentials (M‐wave H‐reflex), level voluntary activation (LOA, using twitch...