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Publications associées (22)

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Gait Variability to Phenotype Common Orthopedic Gait Impairments Using Wearable Sensors

Wei Zhang

Mobility impairments are a common symptom of age-related degenerative diseases. Gait features can discriminate those with mobility disorders from healthy individuals, yet phenotyping specific pathologies remains challenging. This study aims to identify if ...

MDPI2022

Single cell atlas of spinal cord injury in mice reveals a pro-regenerative signature in spinocerebellar neurons

Grégoire Courtine, Jordan Squair, Claudia Kathe

After spinal cord injury, tissue distal to the lesion contains undamaged cells that could support or augment recovery. Targeting these cells requires a clearer understanding of their injury responses and capacity for repair. Here, we use single nucleus RNA ...

Nature Portfolio2022

Gait features for discriminating between mobility-limiting musculoskeletal disorders: Lumbar spinal stenosis and knee osteoarthritis

Wei Zhang

Background: Functional ambulation limitations are features of lumbar spinal stenosis (LSS) and knee osteoarthritis (OA). With numerous validated walking assessment protocols and a vast number of spatiotemporal gait parameters available from sensor-based as ...

ELSEVIER IRELAND LTD2020

Spatiotemporal Maps of Proprioceptive Inputs to the Cervical Spinal Cord During Three-Dimensional Reaching and Grasping

Auke Ijspeert, Marco Capogrosso, Nathan Antoine Greiner, Shravan Tata Ramalingasetty, Pierre Charles Marie Kibleur

Proprioceptive feedback is a critical component of voluntary movement planning and execution. Neuroprosthetic technologies aiming at restoring movement must interact with it to restore accurate motor control. Optimization and design of such technologies de ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020

Clinical implementation of accelerated T-2 mapping: Quantitative magnetic resonance imaging as a biomarker for annular tear and lumbar disc herniation

Tobias Kober, Tom Hilbert

Objectives This study evaluates GRAPPATINI, an accelerated T-2 mapping sequence combining undersampling and model-based reconstruction to facilitate the clinical implementation of T-2 mapping of the lumbar intervertebral disc. Methods Fifty-eight individua ...

SPRINGER2021

The relevance of the artery of Adamkiewicz for microsurgical resection of spinal tumors- short overview and case series: Technical note

Constantin Tuleasca

Introduction. - There is of major interest to know the exact anatomical location of artery of Adamkiewicz (AKA) for many spinal microsurgical procedures, so as to avoid postoperative ischemia of the spinal cord, with further devastating clinical impact. Me ...

2020

Refinements of hybrid neurophysical volume conductor models and application to study epidural electrical stimulation of the cervical spinal cord

Nathan Antoine Greiner

After spinal cord injury (SCI), the communication between the brain and spinal neural circuits below the lesion is disrupted, leading to paralysis. Epidural electrical stimulation (EES) of the lumbosacral spinal cord has been shown to restore locomotion an ...

EPFL2020

Neuroprosthetic Technologies to Evaluate and Train Leg Motor Control in Neurologically Impaired Individuals

Camille Georgette Marie Le Goff-Mignardot

Spinal cord injury (SCI) disrupts many essential sensorimotor and autonomic functions. Consequently, individuals with SCI can face decades with permanent disabilities. Advances in clinical management have decreased morbidity, but no clinical trial has yet ...

EPFL2019

Advantages of soft subdural implants for the delivery of electrochemical neuromodulation therapies to the spinal cord

Stéphanie Lacour, Grégoire Courtine, Marco Capogrosso, Pavel Musienko, Eduardo Martin Moraud, Ivan Rusev Minev, Nikolaus Wenger, Jérôme Gandar, Nathan Antoine Greiner

Objective. We recently developed soft neural interfaces enabling the delivery of electrical and chemical stimulation to the spinal cord. These stimulations restored locomotion in animal models of paralysis. Soft interfaces can be placed either below or abo ...

2018

Tailoring swelling to control softening mechanisms during cyclic loading of PEG/cellulose hydrogel composites

Dominique Pioletti, Pierre-Etienne Bourban, Baris Çaglar, Azadeh Khoushabi, Céline Samira Wyss

One of the novel approaches for discogenic lower back pain treatment is to permanently replace the core of the intervertebral disc, so-called Nucleus Pulposus, through minimally invasive surgery. Recently, we have proposed Poly(Ethylene Glycol) Dimethacryl ...

2018

A Computational Approach for the Design of Epidural Electrical Spinal Cord Stimulation Strategies to Enable Locomotion after Spinal Cord Injury

Emanuele Formento

Spinal cord injury (SCI) is a major cause of paralysis with currently no effective treatment. Epidural electrical stimulation (EES) of the lumbar spinal cord has been shown to restore locomotion in animal models of SCI, but has not yet reached the same lev ...

EPFL2018

A photopolymerized composite hydrogel and surgical implanting tool for a nucleus pulposus replacement

Dominique Pioletti, Christophe Moser, Pierre-Etienne Bourban, Andreas Schmocker, Azadeh Khoushabi

Nucleus pulposus replacements have been subjected to highly controversial discussions over the last 40 years. Their use has not yet resulted in a positive outcome to treat herniated disc or degenerated disc disease. The main reason is that not a single imp ...

Elsevier2016

Surgical probe and implant development for nucleus pulposus replacements

Andreas Schmocker

Intervertebral disc degeneration is a major reason why we experience low back pain. Intervertebral discs are located in-between the vertebrae of the spine. They act, among other, as shock absorbers by distributing the mechanical load applied to the spine w ...

EPFL2016

A brain-spine interface alleviating gait deficits after spinal cord injury in primates

Silvestro Micera, Grégoire Courtine, Jocelyne Bloch, Marco Capogrosso, Quentin Barraud, Eduardo Martin Moraud, Fabien Bertrand Paul Wagner, Jérôme Gandar, Jean-Baptiste Mignardot, Tomislav Milekovic, David Allenson Borton, Elodie Rey

Spinal cord injury disrupts the communication between the brain and the spinal circuits that orchestrate movement. To bypass the lesion, brain-computer interfaces(1-3) have directly linked cortical activity to electrical stimulation of muscles, and have th ...

Nature Publishing Group2016

Development of an in situ controllable polymerization tool and process for hydrogel used to replace nucleus pulposus

Dominique Pioletti, Christophe Moser, Pierre-Etienne Bourban, Andreas Schmocker, Azadeh Khoushabi

Currently implants or tissue replacements are inserted either as a whole implant or by injecting a liquid which polymerizes to form a solid implant at the appropriate location. This is either highly invasive or not controllable. We developed a tool to perf ...

Spie-Int Soc Optical Engineering2015

Multi-Scale Modeling Of Photopolymerization For Medical Hydrogel-Implant Design

Jan-Anders Edvin Maansson, Dominique Pioletti, Pierre-Etienne Bourban, Salma Farahi, Andreas Schmocker, Azadeh Khoushabi

We report on the modeling of a photopolymerizable hydrogel and its application as a replacement of the interior of the intervertebral disc (so called Nucleus Pulposus). The hydrogel is initially injected in its liquid form and then photopolymerized via a s ...

Spie-Int Soc Optical Engineering2013

Damping properties of the nucleus pulposus

Dominique Pioletti, Arne Christian Vogel

Background: The nucleus pulposus is extremely deformable and it is not uncommon to observe strain amplitudes as large as 12.5% in physiological loading conditions. It has been shown that the nucleus pulposus contributes to the damping properties of the int ...

Elsevier2012

Magnetic resonance 4D flow analysis of cerebrospinal fluid dynamics in Chiari I malformation with and without syringomyelia

To analyse cerebrospinal fluid (CSF) hydrodynamics in patients with Chiari type I malformation (CM) with and without syringomyelia using 4D magnetic resonance (MR) phase contrast (PC) flow imaging. 4D-PC CSF flow data were acquired in 20 patients with CM ( ...

Springer2012

Thermomechanical Hysteresis of Biological and Synthetic Hydrogels : Theory, Characterisation, and Development of a Novel Deformation Calorimeter

Arne Christian Vogel

The nucleus pulposus of the intervertebral disc is a gelatinous viscous hydrogel that has an essential role in the mechanics of the intervertebral disc joint. The viscoelastic properties of the nucleus pulposus significantly change in the course of time an ...

EPFL2011

Biocomposite Hydrogels with Carboxymethylated, Nanofibrillated Cellulose Powder for Replacement of the Nucleus Pulposus

Jan-Anders Edvin Maansson, Pierre-Etienne Bourban, Ana Borges de Couraça, Fabien Duc

Biocomposite hydrogels with carboxymethylated, nanofibrillated cellulose (c-NFC) powder were prepared by UV polymerization of N-vinyl-2-pyrrolidone with Tween 20 trimethacrylate as a cross-linking agent for replacement of the native, human nucleus pulposus ...

American Chemical Society2011