Spondylosis is a term referring to degenerative osteoarthritisof the joints between the centra of the spinalvertebrae and/or neuralforaminae. In this condition the interfacetal joints are not involved. Ifsevere, it may cause pressure on nerve roots with subsequent sensoryand/or motordisturbances, such as pain,paresthesia,or muscle weakness in the limbs.
When the space between two adjacent vertebrae narrows, compression of anerve root emerging from the spinal cord may result in radiculopathy(sensory and motor disturbances, such as severe pain in the neck, shoulder,arm, back, and/or leg, accompanied by muscle weakness). Less commonly, directpressure on the spinal cord (typically in the cervical spine) may result in myelopathy,characterized by global weakness, gait dysfunction, loss of balance, and lossof bowel and/or bladder control. The patient may experience a phenomenon ofshocks (paresthesia) in hands and legs because of nerve compression and lack of bloodflow. If vertebrae of the neck are involved it is labeled cervical spondylosis. Lower back spondylosis islabeled lumbar spondylosis,