Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

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

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

Silas Weir Mitchell shown with his sway meter

Silas Weir Mitchell (fifth from right) examining a patient at the Philadelphia Orthopedic Hospital and Infirmary for Nervous Diseases around 1890, surrounded by assistants, house staff, and nurses. Mitchell’s sway meter is shown in the background on the right next to the cabinet and behind both the patient and an observer. (Photograph courtesy of the College of Physicians of Philadelphia.)

Associated Disorders

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