Duchennes Sign
Other Names
- Duchenne's sign
- Duchennes Sign
Purpose
- Clinical finding in patients with ulnar nerve injury
Description
- Ask the patient to attempt to extend their fingers
- This will result in hyperextension of the metacarpophalangeal joints and flexion of the proximal and distal interphalangeal joints[1]
- Produces a "clawing" posture of the 4th and 5th digit
- Occurs due to paralysis of the intrinsic muscles of the hand, specifically the 2 Ulnar Lumbricals, Dorsal Interossei, Palmar Interossei
- All of these mucles are innervated by the ulnar nerve
Pathology
Evidence
- Not applicable
See Also
References
- ↑ Dell, Paul C., and Christopher R. Sforzo. "Ulnar intrinsic anatomy and dysfunction." Journal of Hand Therapy 18.2 (2005): 198-207.
Created by:
John Kiel on 18 September 2025 00:43:49
Authors:
Last edited:
18 September 2025 00:50:39
Category: