What type of deformity is associated with Klumpke's palsy?

• A. Burnout deformity
• B. Wrist drop
• C. Claw hand
• D. Winging scapula

Answer: (C)

Klumpke's palsy is a type of brachial plexus injury that primarily affects the lower trunk of the brachial plexus, usually resulting in damage to the ulnar and median nerves. This injury often occurs during childbirth or as a result of traumatic events, leading to weakness or paralysis of the muscles that these nerves innervate.

The characteristic deformity associated with Klumpke's palsy is the claw hand, which arises due to the impairment of the intrinsic muscles of the hand. The ulnar nerve, which is typically affected, is responsible for the innervation of many of the muscles that help to maintain the stability and function of the fingers. When this nerve is compromised, the fingers may extend at the metacarpophalangeal joints while remaining flexed at the distal interphalangeal joints. This particular posture of the hand resembles a "claw," hence the name "claw hand."

The presence of claw hand reflects not only the weakness of the affected muscles but also the imbalance created by the unopposed action of the extensor muscles, contributing to this deformity's characteristic appearance. Thus, recognizing claw hand as the deformity associated with Klumpke's palsy is essential for