Peripheral Mononeuropathy - Ulnar Nerve Palsy Flashcards
1
Q
Aetiology of Ulnar Nerve Palsy.
A
- Trauma at Medial Epicondyle.
- Compression in Cubital Tunnel.
- Lacerations to Anterior Wrist (Guyon’s Canal)
2
Q
Clinical Features of Ulnar Nerve Palsy.
A
- Paralysis of Interossei - No Abduction or Adduction of Fingers.
- Paralysis/Wasting of Medial 2 Lumbricals and Hypothenar Muscles : Impaired Movement of 4th and 5th Digits.
- Impaired Adduction of Thumb : Positive Froment’s Sign (Paralysis of Adductor
Policies). - Claw Hand - Hyperextension of MCP Joints and Flexion of DIP and PIP of 4th and 5th Joints.
3
Q
What is Cubital Tunnel Syndrome?
A
Compression of Ulnar Nerve as it passes through Cubital Tunnel.
4
Q
Clinical Features of Cubital Tunnel Syndrome (3).
A
- Tingling + Numbness of 4th and 5th Finger.
- Weakness and Muscle Wasting.
- Pain Worse on Leaning on Elbow.
5
Q
What is the Ulnar Paradox?
A
Greater clawing in the hand when there is a lesion at the wrist compared to the elbow - higher lesions cause weakness of flexor digitorum of Flexor Digitorum Profundus.