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There are many known subgroups of AMC, with differing signs, symptoms, causes etc. In some cases, few joints may be affected and may have a nearly full range of motion. In the most common type of arthrogryposis, hands, wrists, elbows, shoulders, hips, feet and knees are affected. In the most severe types, nearly every joint is involved, including the jaw and back. Frequently, the contractures are accompanied by muscle weakness, which further limits movement. AMC is typically symmetrical and involves all four extremities with some variation seen. |
