A Mechanical Descriptor of Instability in Human Locomotion: Experimental Findings in Control Subjects and People with Transfemoral Amputation
Article dans une revue avec comité de lecture
While multiple criteria to quantify gait instability exist, some limitations hinder their computation during realistic walking conditions. A descriptor, computed as the distance between the center of mass of the body and the minimal moment axis ( dCOM−Δ) , has been proposed recently. This present study aims at characterizing the behavior of the mentioned descriptor in a population at a higher risk of falls. Five individuals with transfemoral amputation and 14 healthy individuals were involved in an experiment composed of motion capture and force plates acquisition during overground walking at a self-selected speed. For both groups of participants, the profile of dCOM−Δ was analyzed and descriptive parameters were calculated. The plot of dCOM−Δ was different between groups and different relative to the leading limb considered (prosthetic or contralateral). All descriptive parameters calculated, except one, were statistically different between groups. As a conclusion, amputees seem to be able to limit the average of dCOM−Δ in spite of a different evolution pattern. This is consistent with the ability of the subjects to maintain their dynamic balance. However, the extracted parameters showed the significant asymmetry of the gait profile between prosthetic and contralateral stances and highlighted the potential sources of imbalance.
Files in this item
Showing items related by title, author, creator and subject.
Is a simplified Finite Element model of the gluteus region able to capture the mechanical response of the internal soft tissues under compression? Article dans une revue avec comité de lectureMACRON, Aurélien; PILLET, Hélène; DORIDAM, Jennifer; RIVALS, Isabelle; SADEGHINIA, Mohammad Javad; VERNEY, Alexandre; ROHAN, Pierre-Yves (Elsevier, 2020)Internal soft tissue strains have been shown to be one of the main factors responsible for the onset of Pressure Ulcers and to be representative of its risk of development. However, the estimation of this parameter using ...
Evaluation of the Agreement Between Ultrasound-Based and Bi-Planar X-Ray Radiography-Based Assessment of the Geometrical Features of the Ischial Tuberosity in the Context of the Prevention of Seating-Related Pressure Injury Chapitre d'ouvrage scientifiqueBERRIOT, Audrey; FOUGERON, Nolwenn; BONNET, Xavier; PILLET, Hélène; ROHAN, Pierre-Yves (Springer International Publishing, 2021)The proper management of the local mechanical environment within soft tissues is a key challenge central the prevention of Pressure Ulcers (PUs). Magnetic Resonance (MR) imaging is the preferred imaging modality to measure ...
Gait event detection using inertial measurement units in people with transfemoral amputation: a comparative study Article dans une revue avec comité de lectureSIMONETTI, Emeline; VILLA, Coralie; BASCOU, Joseph; VANNOZZI, Giuseppe; BERGAMINI, Elena; PILLET, Hélène (Springer Science and Business Media LLC, 2019)In recent years, inertial measurement units (IMUs) have been proposed as an alternative to force platforms and pressure sensors for gait events (i.e., initial and final contacts) detection. While multiple algorithms have ...
A preliminary investigation of handrim kinetics in various environmental situations crossed in manual wheelchair Communication avec acteLOUESSARD, Aude; ROUVIER, Théo; BASCOU, Joseph; HYBOIS, Samuel; PILLET, Hélène; SAURET, Christophe (Taylor & Francis, 2021)During manual wheelchair (MWC) locomotion, the user's upper limbs are subject to significant levels of stress and fatigue because the upper body is permanently engaged to propel the MWC and in all daily activities (van der ...
Evolution of vaulting strategy during locomotion of individuals with transfemoral amputation on slopes and cross-slopes compared to level walking Article dans une revue avec comité de lectureVILLA, Coralie; DREVELLE, Xavier; BONNET, Xavier; LAVASTE, François; LOIRET, Isabelle; FODÉ, Pascale; PILLET, Hélène (Elsevier BV, 2015)Background: Vaulting is a walking strategy qualitatively characterized in clinics by the sound ankle plantiflexion in midstance to assist prosthetic foot clearance. Even though potentially harmful, this strategy is often ...