Glossary of Chiropractic Terms and Conditions
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FacetA small, smooth area on bone or other hard surface.
Facilitative LesionA twisting or stretching of nerve tissue due to a malfunctioning spine.
FixationBeing held in a fixed position. An area of the spine with restricted movement.
FlexionTo bend to the side, forward, or backward.
ForamenA small opening.
FibromyalgiaFibromyalgia is a common condition characterized by long-term, body-wide pain and tender points in joints, muscles, tendons, and other soft tissues.

Fibromyalgia has also been linked to fatigue, morning stiffness, sleep problems, headaches, numbness in hands and feet, depression, and anxiety. Fibromyalgia can develop on its own or along with other musculoskeletal conditions such as rheumatoid arthritis or lupus.