| Direction-dependent neck and trunk postural reactions during sitting. | |
| | |
MedLine Citation:
|
PMID: 21917476 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Postural reactions in healthy individuals in the seated position have previously been described and have been shown to depend on the direction of the perturbation; however the neck response following forward and backward translations has not been compared. The overall objective of the present study was to compare neck and trunk kinematic, kinetic and electromyographic (EMG) stabilization patterns of seated healthy individuals to forward and backward translations. Ten healthy individuals, seated on a chair fixed onto a movable platform, were exposed to forward and backward translations (distance=0.15m, peak acceleration=1.2m/s(2)). The head and trunk kinematics as well as the EMG activity of 16 neck and trunk muscles were recorded. Neck and trunk angular displacements were computed in the sagittal plane. The centers of mass (COMs) of the head (HEAD), upper thorax (UPTX), lower thorax (LOWTX) and abdomen (ABDO) segments were also computed. Moments of force at the C7-T1 and L5-S1 levels were calculated using a top-down, inverse dynamics approach. Forward translations provoked greater overall COM peak displacements. The first peak of moment of force was also reached earlier following forward translations which may have played a role in preventing the trunk from leaning backwards. These responses can be explained by the higher postural threat imposed by a forward translation. |
| | |
Authors:
|
Nancy St-Onge; Julie N Côté; Richard A Preuss; Isabelle Patenaude; Joyce Fung |
Related Documents
:
|
10852236 - Differential effects of vestibular stimulation on walking and running. 11222936 - Effect of slip on movement of body center of mass relative to base of support. 16000536 - Spatial and temporal patterns of water flow generated by suction-feeding bluegill sunfi... 22324746 - Determination of the microbial origin of geosmin in chinese liquor. 20404166 - Cyanobacteriochrome ccas regulates phycoerythrin accumulation in nostoc punctiforme, a ... 21900476 - Roles of biogenic amines in regulating bioluminescence in the australian glowworm arach... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-9-12 |
Journal Detail:
|
Title: Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology Volume: - ISSN: 1873-5711 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
|
Created Date: 2011-9-15 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9109125 Medline TA: J Electromyogr Kinesiol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
|
Department of Exercise Science, Concordia University, 7141 Sherbrooke St. West, Montreal, QC, Canada H4B 1R6; Constance-Lethbridge Rehabilitation Center, Montreal Center for Interdisciplinary Research in Rehabilitation (CRIR), 7005 Maisonneuve W., Montreal, QC, Canada H4B 1T3; Feil & Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, 3205 Place Alton Goldbloom, Laval, QC, Canada H7V 1R2. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The effect of plantar flexor muscle fatigue on postural control.
Next Document: Unwitnessed Stroke: Impact of Different Onset Times on Eligibility into Stroke Trials.