7A. Carpal tunnel-syndrome

Page created on June 3, 2021. Not updated since.


Carpal tunnel syndrome is the most common cause of median nerve lesion. It’s a compression neuropathy due to entrapment of the median nerve within the carpal tunnel at the wrist. Demyelination of the median nerve occurs.

The risk factors are:

  • Obesity
  • Female
  • Diabetes
  • Pregnancy
  • Certain repetitive wrist movements at work

Clinical features

  • Sensory symptoms (pain, paraesthesia)
    • Middle of the palm
    • Palmar aspect of first, second, and third fingers
    • Lateral half of the fourth finger
  • Motor symptoms (less common)
    • Weak pinching
    • Weak grip
    • Thenar atrophy

Diagnosis and evaluation

ENG can show demyelination (slow conduction), and ultrasound can show enlarged nerve.


Treatment options include splinting, steroid injection, and surgical cutting of the carpal tunnel.

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6B. Guillain-Barre syndrome

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7B. Secondary headaches

Parent page:
Neurology 2

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