The effect of passive vertebral rotation on pressure in the nucleus pulposus.
To study the immediate effects of axial rotation on the intervertebral disc, six pig cadaver lumbar functional spinal units were exposed to rotations of up to 2 degrees, while disc height and intradiscal pressure were measured. The results showed that rotary movements are capable of causing an immediate increase in disc height and drop in nucleus pressure. However, the long-term effects were opposite in direction.
van Deursen
D L
DL
Department of Mechanical Engineering, Delft University of Technology, Kluyverweg 2a 2629 HT Delft, The Netherlands. dl.vandeursen@wbmt.tudelft.nl
Snijders
C J
CJ
van Dieën
J H
JH
Kingma
I
I
van Deursen
L L
LL
D000704:Analysis of Variance; D000818:Animals; D007403:Intervertebral Disc / Q000502:physiology; D011312:Pressure; D012399:Rotation; D013131:Spine / Q000502:physiology*; D013552:Swine; D014102:Torsion Abnormality; D016474:Weight-Bearing