Klumpke Palsy

A 3-month-old infant presents with weakness in the intrinsic muscles of the hand and a 'claw hand' deformity. Sensory loss is noted along the ulnar aspect of the forearm and hand. Which of the following brachial plexus roots is primarily involved in this condition?

A neonate diagnosed with Klumpke's palsy is also found to have ipsilateral ptosis, miosis, and anhidrosis. This constellation of symptoms is known as Horner's syndrome and indicates involvement of which specific structure?

A 2-year-old child presents with a history of birth trauma involving hyperabduction of the arm. On examination, the child exhibits weakness in the wrist and finger flexors, and the intrinsic muscles of the hand. The most likely clinical deformity observed in this child would be:

Which of the following findings is most helpful in differentiating Klumpke's palsy from Erb's palsy in a neonate?

A 6-month-old infant with Klumpke's palsy shows no signs of recovery despite conservative management including physiotherapy. What is the most appropriate next step in management?