combustion. n. 1. the process of burning. 2. (Chemistry) any process in which a substance reacts with oxygen to produce a significant rise in temperature and the emission of light. 3. (Chemistry) a chemical process in which two compounds, such as sodium and chlorine, react together to produce heat and light.
Facet joint syndrome is an arthritis-like condition of the spine that can be a significant source of back and neck pain. It is caused by degenerative changes to the joints between the spine bones. The cartilage inside the facet joint can break down and become inflamed, triggering pain signals in nearby nerve endings.
By Michael Perry, M.D. If you have been diagnosed with lumbar facet syndrome, you may experience symptoms that affect your lower back, buttocks, thighs and, possibly, lower legs and feet. Facet syndrome, also known as spinal arthritis, is a condition in which the layer of cartilage on the facet joints breaks down due to age, injury or repetitive actions.