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.
1 The thoracic spine has 12 vertibrae which the ribs attach to. 2  The lumbar spine has 5 which make the lower back. 3  The sacrum consists of 5 bones which are fused or stuck together and the coccyx is made up of 4 tiny bones and used to be a tail.