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Muscle Contributions to L4-5 Joint Rotational Stiffness following Sudden Trunk Flexion and Extension Perturbations
Joint Authors
Dickey, James P.
Potvin, Jim R.
Cort, Joel A.
Source
Journal of Medical Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-01-14
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
The purpose of this study was to investigate the contribution of individual muscles (MJRSm) to total joint rotational stiffness (MJRST) about the lumbar spine's L4-5 joint prior to, and following, sudden dynamic flexion or extension perturbations to the trunk.
We collected kinematic and surface electromyography (sEMG) data while subjects maintained a kneeling posture on a parallel robotic platform, with their pelvis constrained by a harness.
The parallel robotic platform caused sudden inertial trunk flexion or extension perturbations, with and without the subjects being aware of the timing and direction.
Prevoluntary muscle forces incorporating both short and medium latency neuromuscular responses contributed significantly to joint rotational stiffness, following both sudden trunk flexion and extension motions.
MJRST did not change with perturbation direction awareness.
The lumbar erector spinae were always the greatest contributor to MJRST.
This indicates that the neuromuscular feedback system significantly contributed to MJRST, and this behaviour likely enhances joint stability following sudden trunk flexion and extension perturbations.
American Psychological Association (APA)
Cort, Joel A.& Dickey, James P.& Potvin, Jim R.. 2013. Muscle Contributions to L4-5 Joint Rotational Stiffness following Sudden Trunk Flexion and Extension Perturbations. Journal of Medical Engineering،Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-507776
Modern Language Association (MLA)
Cort, Joel A.…[et al.]. Muscle Contributions to L4-5 Joint Rotational Stiffness following Sudden Trunk Flexion and Extension Perturbations. Journal of Medical Engineering No. 2013 (2013), pp.1-10.
https://search.emarefa.net/detail/BIM-507776
American Medical Association (AMA)
Cort, Joel A.& Dickey, James P.& Potvin, Jim R.. Muscle Contributions to L4-5 Joint Rotational Stiffness following Sudden Trunk Flexion and Extension Perturbations. Journal of Medical Engineering. 2013. Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-507776
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-507776