Wartenberg's Sign Special Test

What is it used for?

• Diagnosing Ulnar Nerve Neuropathy.

How to Perform

• Action: Patient places hand flat on table and attempts to adduct (bring together) all fingers.

Interpretation of Results

• Positive Test: The little finger drifts into abduction (away from the ring finger).
• Why: Weakness of the palmar interossei muscles (Ulnar nerve) allows the extensors to pull the finger out.

References

• Wartenberg's Sign | Orthofixar