Tips for packing your crib. 1  If you have a portable crib, this will of course be much easier to transport than a stationary one, as most models are collapsible and can be folded up and stowed easily in a personal vehicle or moving truck.
Figure 3. Spondylolisthesis is the forward slippage of a vertebra out of its normal position caused by spondylolysis. The facet joint is no longer able to hold the vertebra in place against the ever-present downward force of body weight. Slippage is measured on a scale from grade 1 slippage (25%) to grade 4 (100%).
If the main sense of movement on the fault plane is up (compressional; reverse) or down (extensional;normal), it is called a dip-slip fault. Where the main sense of slip is horizontal the fault is known as a strike-slip fault. Oblique-slip faults have both strike and dip slip.