This is weakness of one limb when compared to the other.

Always check the normal limb and then immediately check corresponding other limb

Upper limb monoplegia

  • Multiple sclerosis
  • Encephalitis
  • Poliomyelitis
  • Mononeuropathy
  • Brachial plexus lesion

Lower limb monoplegia

  • Multiple sclerosis
  • Cauda equina syndrome
  • Sciatic nerve palsy
  • Prolapsed vertebral disc


This is the weakness of one half of the body

Causes of hemiplegia

  • Strokes
  • Intracranial haemorrhage
  • Meningitis/ meningo-encephalitis
  • Acute disseminated encephalomyelitis
  • Hemiplegic migraine
  • Metabolic causes


Weakness of all limbs


  • Cerebral palsy
  • Cervical cord compression
  • Multiple sclerosis
  • G B Syndrome
  • Myasthenia gravis

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