Influence of anteroposterior shifting of trunk mass centroid on vibrational configuration of human spine.

Influence of anteroposterior shifting of trunk mass centroid on vibrational configuration of human spine. Research Abstract Details 

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Influence of anteroposterior shifting of trunk mass centroid on vibrational configuration of human spine. Abstract Text:

Li-Xin Guo,Ming Zhang,Zhao-Wen Wang,Yi-Min Zhang,Bang-Chun Wen,Jin-Li Li,

This study attempts to determine the influence of anteroposterior (A-P) shifting of trunk mass from the upright sedentary posture on dynamic characteristics of the human lumbar spine. A three-dimensional finite element (FE) model comprising of the T12-Pelvis spine unit was used to mimic the human spine system. It is not clear how the A-P shifting of the upper part of human upper body affect on vibrational modality of the human lumbar spine under whole body vibration. Five trunk mass point locations were assumed by 2.0cm anterior, 1.0cm anterior, 1.0cm posterior and 2.0cm posterior to the upright sedentary posture including no shifting posture. FE modal analysis was used to extract the resonant frequencies and vibration modes of the human spine. The analytical results indicate that trunk mass centroid shifting onwards or rearwards may result in a reduction of vertical resonant frequency of the human spine. The human spine has the highest vertical resonant frequency at the normal upright sedentary posture with the trunk mass locating around 1.0cm anterior to the L3-L4 vertebral centroid. Larger A-P deformations and rotational deformations were also found at the spine motion segments L3-L4 and L4-L5, which imply higher compressive stress and shear stress at the disc annulus of those spinal motion segments. The findings in this study may explain why long-term whole body vibration might induce the degeneration of human spine at the relevant spinal motion segments.

Influence of anteroposterior shifting of trunk mass centroid on vibrational configuration of human spine. Publishing Authors By Initials

LX Guo,M Zhang,ZW Wang,YM Zhang,BC Wen,JL Li,

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Influence of anteroposterior shifting of trunk mass centroid on vibrational configuration of human spine. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Computers in biology and medicine

VOLUME: 38

Page Numbers: 146-51

Journal Abbreviation: Comput. Biol. Med.

ISSN: 0010-4825

DAY: 10

MONTH: 10

YEAR: 2007

Influence of anteroposterior shifting of trunk mass centroid on vibrational configuration of human spine. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Influence of anteroposterior shifting of trunk mass centroid on vibrational configuration of human spine.

AFFILIATION: School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China; Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, China.

Country: United States

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MEDLINETA: Comput Biol Med

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