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The facet joints (also zygapophysial joints, zygapophyseal, apophyseal, or Z-joints) are a set of synovial, plane joints between the articular processes of two adjacent vertebrae. There are two facet joints in each spinal motion segment and each facet joint is innervated by the recurrent meningeal nerves.
The actual region of contact is called the articular facet. [1] Articular processes spring from the junctions of the pedicles and laminæ, and there are two right and left, and two superior and inferior. These stick out of an end of a vertebra to lock with a zygapophysis on the next vertebra, to make the backbone more stable.
On its dorsal surface, it contains the glenoid, a depression into which fits the lower end of the quadrate bone of the skull, forming the jaw joint. It is the only endochondral bone of the lower jaw, forming directly out of the posterior part of the Meckelian cartilage .
Facet joint arthrosis is an intervertebral disc disorder.The facet joints or zygapophyseal joints are synovial cartilage covered joints that limit the movement of the spine and preserve segmental stability.
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Surgeons were able to successfully transplant normal lungs into their bodies. They lived with organs on the wrong side of their bodies until their lungs wore out. Surgeons were able to ...
The lungs are supplied with the largest lymphatic drainage system of any other organ in the body. [17] Each lung is surrounded by a serous membrane of visceral pleura, which has an underlying layer of loose connective tissue attached to the substance of the lung. [18]
Facet joints also prevent each vertebra from slipping over the one below. A small capsule surrounds each facet joint providing a nourishing lubricant for the joint. Also, each joint has a rich supply of tiny nerve fibers that provide a painful stimulus when the joint is injured or irritated. Inflamed facets can cause a powerful muscle spasm.