Ulnar nerve of peripheral nerve injuries

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Parent item

Peripheral nerve injuries

Sub-item

Ulnar nerve injury in arm

Cubital tunnel syndrome

Ulnar nerve injury in elbow/forearm

Ulnar nerve injury in Guyon’s tunnel

RAG

RAG

Last edited time

May 31, 2026 12:14 AM GMT+0

Overview

• Injury/compression sites
(A) Proximal arm
• Complete palsy.
• Usually due to trauma.
(B) Distal arm
• Arcade of Struthers.
(C) Elbow
• Postcondylar groove.
• Cubital tunnel.
• Osborne’s fascia.
• Anconeus muscle.
(D) Proximal forearm
• Flexor-pronator fascia.
(E) Hand: at Guyon’s tunnel
• (E1) Proximal 2/3 of tunnel, proximal to ulnar nerve division.
• (E2) Compression of deep motor division only.
• (E3) Compression of superficial sensory division only.

 

Motor and sensory deficits

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