About Ankylosing Spondylitis. Ankylosing spondylitis is a form of progressive arthritis due to chronic inflammation of the joints in the spine. Its name comes from the Greek words  ankylos,  meaning stiffening of a joint, and  spondylo,  meaning vertebra.nkylosing Spondylitis. A form of arthritis that affects the spine, the sacroiliac joints, and sometimes the hips and shoulders. In severe cases, the joints of the spine fuse and the spine becomes rigid. PubMed Health Glossary. (Source: NIH-National Institute of Arthritis and Musculoskeletal and Skin Diseases).
The most common cause of numbness in the part of the hand that you describe (the ring finger) would be carpal tunnel syndrome, which is a condition in which the median nerve, which runs down the center of the wrist, becomes pinched or inflamed.
Numbness in the hand and ring and pinkie fingers is known as cubital tunnel syndrome. It occurs because the ulnar nerve is subject to a variety of problems, including friction, ulnar nerve dislocation, and impingement of the ulnar nerve, and all of these problems can cause numbness in these fingers.he most common cause cause for numbness and tingling in the hand is carpal tunnel syndrome which is compression of the median nerve in the carpal tunnel of the wrist. This can be painful at the wrist and will typically will cause numbness in the thumb, index and middle finger.