title: Compensation to whole body active rotation perturbation.
abstract: The aim of the present study is the exploration of the compensation mechanisms in healthy adults elicited by superimposing a horizontal perturbation, through a rotation of the support base, during a whole body active rotation around the participant's own vertical body axis. Eight healthy participants stood on a rotating platform while executing 90° whole body rotations under three conditions: no concurrent platform rotation (NP), support surface rotation of ± 45° in the same (45-S) and opposite (45-O) directions. Participants' kinematics and CoP displacements were analyzed with an optoelectronic system and a force platform. In both 45-S and 45-O conditions, there was a tendency for the head to be affected by the external perturbation and to be the last and least perturbed segment while the pelvis was the most perturbed. The observed reduced head perturbation in 45-S and 45-O trials is consistent with a goal-oriented strategy mediated by vision and vestibular information, whereas the tuning of lumbar rotation is consistent with control mechanisms mediated by somato-sensory information.
authors.affiliation: Department of Economics and Management - Industrial Engineering (DEIM), University of Tuscia, Viterbo, Italy; Movement Analysis and Robotic Laboratory (MARLab) - Pediatric Neuro-Rehabilitation Division, "Bambino Gesù" Children's Hospital, IRCCS, Rome, Italy. Electronic address: stefano.rossi@unitus.it.
authors.forename: S
authors.initials: S
authors.lastname: Rossi
authors.forename: S
authors.initials: S
authors.lastname: Gazzellini
authors.forename: M
authors.initials: M
authors.lastname: Petrarca
authors.forename: F
authors.initials: F
authors.lastname: Patanè
authors.forename: I
authors.initials: I
authors.lastname: Salfa
authors.forename: E
authors.initials: E
authors.lastname: Castelli
authors.forename: P
authors.initials: P
authors.lastname: Cappa
mesh_terms: D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D008297:Male; D004856:Postural Balance / Q000502:physiology*; D011434:Proprioception; D012399:Rotation; D014796:Visual Perception; D055815:Young Adult
keywords: Balance; Postural perturbation; Rotating platform