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Wartenberg’s sign represents the position of the little finger that is kept in involuntary, permanent abduction.This indicates an ulnar nerve palsy.
The abduction of the little finger is caused by the lack of action (palsy) of its palmar interossei muscle. The 3rd palmar interossei muscle has the role of bringing the little finger closer to the others.
Interosseous muscles of the hand are innervated by the ulnar nerve. Thus, the Warternberg’s sign indicates a deficit of motor function of the ulnar nerve, respectively an ulnar nerve neuropathy.
Left hand - Negative Wartenberg’s sign = normal function of ulnar nerve. Right hand - Positive Wartenberg’s sign = affected ulnar nerve.
Wartenberg’s sign can suggest:
Ulnar nerve damage resulted from compression neuropathy of the ulnar nerve, in cubital tunnel syndrome or Guyon syndrome.
Other serious diseases: cervical disc herniations with affected cervical roots.
Very serious diseases: ulnar nerve damage as part of polyneuropathies or damage of motor neurons found in amyotrophic lateral sclerosis.
Other signs of ulnar nerve damage:
Tingling and numbness in 4th and 5th fingers
Loss of hand strength
Wartenberg’s sign
Amyotrophy - loss of muscle mass.
If the neuropathy is diagnosed and treated early, those symptoms will disappear or improve depending on the stage. Postponement or lack of treatment favors the rapid onset of irreversible consequences.
Severe case of ulnar neuropathy.
Important! This video was created for informational purposes only! It does not replace a medical consultation and does not establish a diagnosis. Please seek specialist advice before any medical decision.
Негізгі бет Wartenberg’s sign 👉 the incapacity of bringing the little finger close to the others
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