| | Arthritis of the Thumb - DynoMed.com (Site not responding. Last check: ) |
 | | By using the small muscles arranged around the first metacarpal, the joint at the base of the thumb can rotate around a wide arc - in and out of the palm of the hand. It is this movement that allows the thumb to oppose the fingers for pinching and grasping activities. |
 | | Basal joint arthritis is caused by wear and tear on the joint at the base of the thumb, perhaps as the result of a fracture or injury. Repeated motions such as twisting, turning, or gripping objects with the thumb and fingers can worsen this condition. |
 | | X-rays will give the doctor an appreciation of the status of the joints at the base of the thumb and special views may be used to show the position of the first metacarpal and the integrity of the joint surfaces. |
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