Sex-dependent evolution of whole-body postural alignment with age.

Purpose: The goal of this study was to explore sex-related variations of global alignment parameters and their distinct evolution patterns across age groups.

Methods: This multicentric retrospective study included healthy volunteers with full-body biplanar radiographs in free-standing position. All radiographic data were collected from 3D reconstructions: global and lower limb parameters, pelvic incidence (PI) and sacral slope (SS).

Full-body Postural Alignment Analysis Through Barycentremetry.

Study Design: A multicentric retrospective study.

Objective: The study of center of mass (COM) locations (ie, barycentremetry) can help us understand postural alignment. The goal of this study was to determine relationships between COM locations and global postural alignment x-ray parameters in healthy subjects.

Neurophysiological basis of respiratory discomfort improvement by mandibular advancement in awake OSA patients.

Patients with obstructive sleep apneas (OSA) do not complain from dyspnea during resting breathing. Placement of a mandibular advancement device (MAD) can lead to a sense of improved respiratory comfort ("pseudo-relief") ascribed to a habituation phenomenon. To substantiate this conjecture, we hypothesized that, in non-dyspneic awake OSA patients, respiratory-related electroencephalographic figures, abnormally present during awake resting breathing, would disappear or change in parallel with MAD-associated pseudo-relief.

Functional analysis of the human rib cage over the vital capacity range in standing position using biplanar X-ray imaging.

Pathologies of the respiratory system can by accompanied by alterations of the biomechanical function of the rib cage, as well as of its morphology and movement. The assessment of such pathologies could benefit from rib cage kinematic analysis during breathing, but this analysis is challenging because of the difficulties in observing and quantifying bone movements in vivo. This work explored the feasibility of using biplanar x-rays to study rib cage modifications at different lung volumes and evaluated the potential of the method to characterize rib cage kinematic patterns in patients.