What is a characteristic symptom of Klumpke's paralysis?

Klumpke's paralysis is characterized predominantly by hand paralysis due to injury of the lower trunk of the brachial plexus, which typically occurs with excessive upward pulling of the arm during delivery or traumatic shoulder injuries. In Klumpke's paralysis, the muscles controlling the hand and wrist are affected, leading to weakness or paralysis in these areas. This results in difficulties with grip strength and coordination of the hand.

This condition specifically involves the intrinsic muscles of the hand, which can lead to a claw-like appearance of the hand due to unopposed action of the extensors when the flexors are weakened. Individuals with Klumpke's paralysis often struggle to perform fine motor tasks and lack the ability to grasp effectively, which emphasizes the importance of hand paralysis as the distinguishing symptom of this type of brachial plexus injury.

Other symptoms, such as an absent Moro reflex, are not specific to Klumpke's paralysis and may indicate other neurological issues. The waiter's tip hand posture is characteristic of Erb's palsy, another form of brachial plexus injury that affects the upper trunk, whereas having an intact grasp reflex doesn't align with the paralysis expected in Klumpke's. Therefore, hand paralysis stands out as the defining symptom