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ajay.dherwani
Sun Sep 27 2015, 11:58AM
Registered Member #4195
Joined: Sun Sep 27 2015, 11:48AM
Posts: 1
Hi. can anyone explain me regarding the biomechanics of lumbar spine. as its stated that lumbar spine due to facet orientation just allows flex.ext.lat flexion but almost no rotation.
but if we read in the text and other books lumbar does have rotation. can anyone please explain if i have got this wrong and eleborate me with reason
thanks

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Robin
Sat Oct 03 2015, 07:47AM
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ajay.dherwani wrote ...
Hi. can anyone explain me regarding the biomechanics of lumbar spine. as its stated that lumbar spine due to facet orientation just allows flex.ext.lat flexion but almost no rotation. but if we read in the text and other books lumbar does have rotation. can anyone please explain if i have got this wrong and eleborate me with reason thanks
 
Hi Ajay Dherwani,
A lumbar facet joint attributes to 1-2 degrees of rotational movement at each unit level. Jaumard NV, Welch WC, Winkelstein BA. Spinal Facet Joint Biomechanics and Mechanotransduction in Normal, Injury and Degenerative Conditions.Journal of Biomechanical Engineering. 2011;133(7):71010-NaN. doi:10.1115/1.4004493. 
Lumbar AROM rotation is 3-18 degrees(different from total trunk rotation which about 45 degrees) which is a combination of rotation at L1-5 levels and a combination of flexion/lateral flexion motion. Axial rotation and lateral bending in the normal lumbar spine measured by three-dimensional radiography. Pearcy MJTibrewal SB.
Hope this helps.

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