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.
Vertebral Column Overview. The Vertebral column (spinal column) supports the head and encloses the spinal cord. The spinal column is comprised of 26 individual bones, these bones are referred to as vertebrae.The spinal column is divided into 5 different areas containing groups of vertebrae and are grouped as follows:7 cervical vertebrae in the neck. 12 thoracic vertebrae in the upper back corresponding to each pair of ribs. 5 lumbar vertebrae in the lower back.5 sacral vertebrae which are fused together to form 1 bone called the sacrum. 4 coccygeal vertebrae that are fused together to form the coccyx or tail-bone. The vertebrae are referred to by their name and number, counting down from the top of the spinal column as follows:he thoracic vertebrae are T1 - T12. The lumbar vertebrae are L1 - L5. The sacrum and coccyx do not have numbers and each is thought of as one bone. Spinal nerves exit the sacrum and coccyx at levels (Foramen) within the main structure of each vertebra.