Spondylosis (from Ancient Greek σφόνδυλος spóndylos, "a vertebra", in plural "vertebrae – the backbone") is degenerative osteoarthritis of the joints between the center of the vertebrae or neural foramina. If this condition occurs in the facet joints, it can be considered facet syndrome. If severe, it may cause pressure on nerve roots with subsequent sensory or motor disturbances, such as pain, paresthesia, and muscle weakness in the limbs.