synonyms: Ulnar Neuropathy
Ulnar Nerve Palsy ICD-10
Ulnar Nerve Palsy ICD-9
- 354.2 Lesion of ulnar nerve; cubital tunnel syndrome; tardy ulnar nerve palsy
Ulnar Nerve Palsy Etiology / Epidemiology / Natural History
- Ulnar nerve is most commonly compressed at the elbow(cuitbal tunnel syndrome). Distal nerve compression is uncommon.
Ulnar Nerve Palsy Anatomy
- Dorsal sensory branch of ulnar N supplies sensation of dorsal ulnar wrist and branches off before wrist.
Ulnar Nerve Palsy Clinical Evaluation
- Progressive unilateral hand weakness and numbness involving his ring and small fingers.
- Generally minimal pain if nerve compression is distatl
- Intrinsic weakness and atrophy, with normal strength of the flexor digitorum profundus and small flexor carpi ulnaris and abductor pollicis brevis muscles.
- Increased 2-point discrimination to the small finger and ulnar ring finger.
- Normal dorsal ulnar hand sensation indicates lesion is distal to cubital tunnel.
Ulnar Nerve Palsy Xray / Diagnositc Tests
- EMG can show normal conduction of the ulnar nerve across the elbow with denervation of the intrinsics
- Consider MRI of the wrist and hand to eval for ganglion within Guyon’s canal compressing the ulnar nerve.
Ulnar Nerve Palsy Classification / Treatment
Ulnar Nerve Palsy Associated Injuries / Differential Diagnosis
Ulnar Nerve Palsy Complications
Ulnar Nerve Palsy Follow-up Care
Ulnar Nerve Palsy Review References