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.
This portion of the spine is meant to support the rib cage and provide proper posture for the body. The 12 vertebrae that make up the thoracic spine, commonly referred to as T1-T12, each have two facet joint sets â one set on the top and one set on the bottom â that are responsible for providing the middle back with flexibility and strength.