The Effect of Muscle Direction on the Predictions of Finite Element Model of Human Lumbar Spine.

Abstract:

:The normal physiological loads from muscles experienced by the spine are largely unknown due to a lack of data. The aim of this study is to investigate the effects of varying muscle directions on the outcomes predicted from finite element models of human lumbar spine. A nonlinear finite element model of L3-L5 was employed. The force of the erector spinae muscle, the force of the rectus abdominis muscle, follower loads, and upper body weight were applied. The model was fixed in a neural standing position and the direction of the force of the erector spinae muscle and rectus abdominis muscle was varied in three directions. The intradiscal pressure, reaction moments, and intervertebral rotations were calculated. The intradiscal pressure of L4-L5 was 0.56-0.57 MPa, which agrees with the in vivo pressure of 0.5 MPa from the literatures. The models with the erector spinae muscle loaded in anterior-oblique direction showed the smallest reaction moments (less than 0.6 Nm) and intervertebral rotations of L3-L4 and L4-L5 (less than 0.2 degrees). In comparison with loading in the vertical direction and posterior-oblique direction, the erector spinae muscle loaded in the anterior-oblique direction required lower external force or moment to keep the lumbar spine in the neutral position.

journal_name

Biomed Res Int

authors

Zhu R,Niu WX,Wang ZP,Pei XL,He B,Zeng ZL,Cheng LM

doi

10.1155/2018/4517471

subject

Has Abstract

pub_date

2018-01-03 00:00:00

pages

4517471

eissn

2314-6133

issn

2314-6141

journal_volume

2018

pub_type

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