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Klumpke paralysis; Erb-Duchenne paralysis; Erb's palsy
Symptoms are noticed immediately or soon after birth, and may include:
A physical exam of the infant may show that the Moro reflex is absent on the affected side. This reflex will usually be present in an infant with weakness or pseudoparalysis, although it might not be as noticeable on the affected side. (In pseudoparalysis, the infant has a fracture and is not moving the arm because of pain.)
The affected arm may flop when the infant is rolled side to side.