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  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

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British physician Marshall Hall (1790 to 1857)

In 1836, Hall described loss of postural control in darkness in a patient with impaired proprioception. (Photograph courtesy of the National Library of Medicine.)

Associated Disorders

  • Ataxia
  • Binswanger disease
  • Dysequilibrium
  • Myasthenia gravis
  • Myelopathy
  • Myopathies
  • Neuropathy
  • Normal pressure hydrocephalus
  • Parkinsonism
  • Psychogenic movement disorders
  • Stroke
  • Vestibular disorders