title: Kinematics and dynamic complexity of postural transitions in frail elderly subjects.
abstract: The aim of this study was to propose a methodology allowing a detailed characterization of body sit-to-stand/stand-to-sit postural transition. Parameters characterizing the kinematics of the trunk movement during sit-to-stand (Si-St) postural transition were calculated using one initial sensor system fixed on the trunk and a data logger. Dynamic complexity of these postural transitions was estimated by fractal dimension of acceleration-angular velocity plot. We concluded that this method provides a simple and accurate tool for monitoring frail elderly and to objectively evaluate the efficacy of a rehabilitation program.
authors.affiliation: School of Engineering, Ecole Politechnique Féderale de Lausanne (EPFL), EPFL STI-LMAM, Station 11, 1015 Lausanne, Switzerland. raluca.ganea@epfl.ch
authors.forename: R
authors.initials: R
authors.lastname: Ganea
authors.forename: A
authors.initials: A
authors.lastname: Paraschiv-Ionescu
authors.forename: A
authors.initials: A
authors.lastname: Salarian
authors.forename: C
authors.initials: C
authors.lastname: Büla
authors.forename: E
authors.initials: E
authors.lastname: Martin
authors.forename: S
authors.initials: S
authors.lastname: Rochat
authors.forename: C
authors.initials: C
authors.lastname: Hoskovec
authors.forename: C
authors.initials: C
authors.lastname: Piot-Ziegler
authors.forename: K
authors.initials: K
authors.lastname: Aminian
mesh_terms: D000054:Acceleration; D000058:Accidental Falls / Q000517:prevention & control*; D000369:Aged, 80 and over; D000465:Algorithms; D001696:Biomechanical Phenomena / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D016330:Frail Elderly; D006801:Humans; D016247:Information Storage and Retrieval / Q000379:methods; D018670:Monitoring, Ambulatory / Q000295:instrumentation* / Q000379:methods; D009068:Movement / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D014159:Transducers