Search

Your search keyword '"Armand, Stéphane"' showing total 694 results
Start Over Author "Armand, Stéphane"
694 results on '"Armand, Stéphane"'

76. Gait stability in ambulant children with cerebral palsy during dual tasks

Author

Wist, Sophie, Carcreff, Lena, Bruijn, Sjoerd M., Allali, Gilles, Newman, Christopher J., Fluss, Joel, Armand, Stéphane, Wist, Sophie, Carcreff, Lena, Bruijn, Sjoerd M., Allali, Gilles, Newman, Christopher J., Fluss, Joel, and Armand, Stéphane

Abstract

Aim: The aim of this cross-sectional study was to measure the effect of dual tasks on gait stability in ambulant children with cerebral palsy (CP) compared to typically developing (TD) children. Methods: The children of the CP (n = 20) and TD groups (n = 20) walked first without a dual task, then while counting forward and finally while alternatively naming fruits and animals (DTf/a). They then completed the same cognitive exercises while sitting comfortably. We calculated the distance between the foot placement estimator (FPE) and the real foot placement in the anterior direction (DFPEAP) and in the mediolateral direction (DFPEML) as a measure of gait stability, in a gait laboratory using an optoelectronic system. Cognitive scores were computed. Comparisons within and between groups were analysed with linear mixed models. Results: The dual task had a significant effect on the CP group in DFPEAP and DFPEML. The CP group was more affected than the TD group during dual task in the DFPEML. Children in both groups showed significant changes in gait stability during dual tasks. Interpretation: The impact of dual task on gait stability is possibly due to the sharing of attention between gait and the cognitive task. All children favoured a ‘posture second’ strategy during the dual task of alternatively naming animals and fruits. Children with CP increased their mediolateral stability during dual task.

Published
2023

77. Sensor-to-Bone Calibration with the Fusion of IMU and Bi-Plane X-rays.

Author

Gasparutto, Xavier, Rose-Dulcina, Kevin, Grouvel, Gautier, DiGiovanni, Peter, Carcreff, Lena, Hannouche, Didier, and Armand, Stéphane

Subjects
JOINT stiffness, TOTAL hip replacement, HUMAN kinematics, JOINT pain, CALIBRATION, X-rays, GAIT in humans
Abstract

Inertial measurement units (IMUs) need sensor-to-segment calibration to measure human kinematics. Multiple methods exist, but, when assessing populations with locomotor function pathologies, multiple limitations arise, including holding postures (limited by joint pain and stiffness), performing specific tasks (limited by lack of selectivity) or hypothesis on limb alignment (limited by bone deformity and joint stiffness). We propose a sensor-to-bone calibration based on bi-plane X-rays and a specifically designed fusion box to measure IMU orientation with respect to underlying bones. Eight patients undergoing total hip arthroplasty with bi-plane X-rays in their clinical pathway participated in the study. Patients underwent bi-plane X-rays with fusion box and skin markers followed by a gait analysis with IMUs and a marker-based method. The validity of the pelvis, thigh and hip kinematics measured with a conventional sensor-to-segment calibration and with the sensor-to-bone calibration were compared. Results showed (1) the feasibility of the fusion of bi-plane X-rays and IMUs in measuring the orientation of anatomical axes, and (2) higher validity of the sensor-to-bone calibration for the pelvic tilt and similar validity for other degrees of freedom. The main strength of this novel calibration is to remove conventional hypotheses on joint and segment orientations that are frequently violated in pathological populations. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

88. sj-docx-1-cho-10.1177_18632521231154975 – Supplemental material for A 10.5-year follow-up of walking with unilateral spastic cerebral palsy

Author

Bonnefoy-Mazure, Alice, De Coulon, Geraldo, Lascombes, Pierre, Bregou, Aline, and Armand, Stéphane

Subjects
FOS: Clinical medicine, 110604 Sports Medicine, FOS: Health sciences, 110314 Orthopaedics
Abstract

Supplemental material, sj-docx-1-cho-10.1177_18632521231154975 for A 10.5-year follow-up of walking with unilateral spastic cerebral palsy by Alice Bonnefoy-Mazure, Geraldo De Coulon, Pierre Lascombes, Aline Bregou and Stéphane Armand in Journal of Children’s Orthopaedics

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results