Humidity, contact with moisture, and stamps sticking to old album pages and then removed are common examples of disturbed gum. Once again, the amount of original gum left (most refer to +/- 50% of the original gum) on the stamp is a distinction that's made amongst some dealers and collectors.
Description of sciatica. Sciatica describes a collection of symptoms that can arise with sciatic nerve compression. This nerve is the largest and longest in the body, running from the base of the spine and down through both legs. Sciatic nerve compression can lead to pain that begins in the lower back and moves through the buttocks, legs and feet.
In total, there are 33 vertebrae in the spinal column: 1  Cervical region (neck) â 7 vertebrae, abbreviated C1 through C7. 2  Thoracic region (middle back) â 12 vertebrae, abbreviated T1 through T12. 3  Lumbar region (low back) â 5 or 6 vertebrae, abbreviated L1 through L5 or L6. 4  Sacral region (pelvis) â 5 fused vertebrae, abbreviated S1 through S5.