ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Osteoarthritis of the cervical spine. Lateral X-rays of the neck of a 57-year-old woman in flexion (left) and extension (right), showing the reduced mobility caused by osteoarthritis. Osteoarthritis is a joint disease aggravated by mechanical stress. Symptoms include joint pain, stiffness and swelling. The effect here is most clearly seen at the level of the C5-C7 vertebrae and the associated intervertebral joints.
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