Paralysis is a complete loss of motor power in any muscle group. When paralysis affects all four extremities, it is called quadriplegia; when it affects only the lower extremities, paraplegia; and when it affects the extremities on one side of the body, hemiplegia. For this reason, the term paralysis is generally reserved for more focal, less stereotyped weakness, for instance, affecting all the muscles innervated by a peripheral nerve. Many different anatomical lesions and etiologies can cause paralysis and determine its treatment.

Original languageEnglish (US)
Title of host publicationEncyclopedia of the Neurological Sciences
PublisherElsevier Inc.
Number of pages1
ISBN (Electronic)9780123851574
ISBN (Print)9780123851581
StatePublished - Jan 1 2014


  • Facial
  • Motor weakness
  • Muscle
  • Nerve
  • Periodic paralysis
  • Weakness

ASJC Scopus subject areas

  • Medicine(all)


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