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. Author manuscript; available in PMC: 2008 May 29.
Published in final edited form as: J Biomech. 2008;41(6):1184–1196. doi: 10.1016/j.jbiomech.2008.02.002

Figure 5.

Figure 5

Comparison of (a,b) oxygen, (c,d) lactate, and (e,f) pH distributions along the radius at ẑ =0 (a,c,e) and the center line at r^ =0 (b,d,f) among the IVDs with 50% permeable endplate boundary above the nucleus. For the static compression test, a constant displacement (10% of disc height) was applied on the IVD. For the dynamic compression test, the IVD was subjected to a sinusoidal displacement (f=0.1 Hz, u1=5% of disc height) for 200 cycles. Concentrations of oxygen and lactate were normalized by their boundary concentrations at the endplate region above the nucleus.