Wartenberg sign involves which of the following?

Wartenberg sign involves which of the following?

• A. Cubital tunnel
• B. Pronator syndrome
• C. Cheiralgia paresthetica
• D. Anterior interosseous syndrome

Answer: (A)

Wartenberg sign is a sign of ulnar nerve palsy affecting the intrinsic hand muscles, especially the interossei. These muscles normally adduct the fingers toward the middle finger; when the ulnar nerve is compromised, they weaken, so the little finger cannot be drawn toward the ring finger and tends to stay in an abducted position. This pattern is classically seen with ulnar neuropathy at the elbow, i.e., compression at the cubital tunnel. The other options involve median or radial nerve problems, which do not produce the specific interosseous weakness and inability to adduct the little finger seen in Wartenberg sign.

Wartenberg sign is a sign of ulnar nerve palsy affecting the intrinsic hand muscles, especially the interossei. These muscles normally adduct the fingers toward the middle finger; when the ulnar nerve is compromised, they weaken, so the little finger cannot be drawn toward the ring finger and tends to stay in an abducted position. This pattern is classically seen with ulnar neuropathy at the elbow, i.e., compression at the cubital tunnel. The other options involve median or radial nerve problems, which do not produce the specific interosseous weakness and inability to adduct the little finger seen in Wartenberg sign.