Furthermore it is also often seen that the flexibility and strength in the wrist extensor and posterior shoulder muscles are deficient. At least patients report weakness in their grip strength or difficulty carrying objects in their hand, especially with the elbow extended. This weakness is due to finger extensor and supinator weakness. Some people have a sense of paralysis but this is rare.
Symptoms last, on average, from 2 weeks to 2 years. 89% of the patients recover within 1 year without any treatment except perhaps avoidance of the painful movements .