Wartenberg Sign

 Wartenberg Sign

What is Wartenberg Sign?

Wartenberg Sign is used in evluation of Ulnar nerve motor weakness.

Ulnar Nerve Other Tests:

How it’s Performed?

Wartenberg Sign

What does a positive Wartenberg Sign mean?


This sign could be confused with Wartenberg Syndrome or Cheralgia Paresthetica, in which the Superficial radial nerve becomes compressed as it comes superficial at brachioradialis and ECRB interval in distal forearm causing sensory disturbance, it’s characterized by pain and tenderness 1 to 2 cm proximal to the radial styloid, and radicular pain distally along the course of the superficial radial nerve elicited by percussion.

Ulnar nerve

Ulnar nerve (C8,T1) is a branch of the medial cord of brachial plexus.

It gives motor branches to:

  1. Flexor carpi ulnaris muscle (FCU).
  2. Ulnar half of flexor digitorum profundus muscle (FDP).
  3. Hypothenar muscles.
  4. Abductor digiti minimi muscle.
  5. Opponens digiti minimi muscle.
  6. Flexor digiti minimi muscle.
  7. Interossei muscles.
  8. 3rd and 4th lumbricals muscles.
  9. Adductor pollicis muscle.
  10. And sometimes deep head of flexor pollicis brevis muscle.

Sensory distribution is over ulnar 1 ½ fingers and ulnar aspect of hand.


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