Age-related changes in shock absorption capacity of the human spinal column
Authors Brzuszkiewicz-Kuźmicka G, Szczegielniak J, Bączkowicz D
Received 7 November 2017
Accepted for publication 5 March 2018
Published 18 May 2018 Volume 2018:13 Pages 987—993
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Justinn Cochran
Peer reviewer comments 2
Editor who approved publication: Dr Richard Walker
Grażyna Brzuszkiewicz-Kuźmicka,1 Jan Szczegielniak,2 Dawid Bączkowicz2
1Department of Rehabilitation, Academy of Physical Education in Warsaw, Warsaw, Poland; 2Faculty of Physical Education and Physiotherapy, Institute of Physiotherapy, Opole University of Technology, Opole, Poland
Background: The spinal column possesses shock absorption properties, mainly provided by the intervertebral discs. However, with the process of senescence, all structures of the spine, including the discs, undergo degenerative changes. It may lead to alteration of the mechanical properties of the spinal motion segment and diminished capacity for vibration attenuation.
Objective: The objective of this study was to investigate the age-related changes in shock absorption properties of the spine.
Patients and methods: A total of 112 individuals divided into three groups according to age (third, fifth, and seventh decades of life) were enrolled in this study. The transmissibility of vibrations through the spine was measured in a standing position on a vibration platform by accelerometers mounted at the levels of S2 and C0. Registered signals were described using four parameters: VMS (variability), peak-to-peak amplitude (PPA), and spectral activity in two bands F2 (0.7–5 Hz) and F20 (15–25 Hz).
Results: In all age groups, signals registered at C0 were characterized by significantly lower values of VMS, PPA, and F20, when compared to level S2. Simultaneously, the parameter F20 significantly differed among all age groups when C0 vibrations were analyzed: 2.43±1.93, 5.02±3.61, and 10.84±5.12 for the third, fifth, and seventh decades of life, respectively.
Conclusion: The human spinal column provides vibration attenuation; however, this property gradually declines with the aging process.
Keywords: vibration transmissibility, amortization, attenuation, senescence process, intervertebral disc
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