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.

  • Listen to MedLink on the go with Audio versions of each article.

Friedrich Heinrich Alexander von Humboldt (1769-1859)

German polymath Friedrich Heinrich Alexander von Humboldt. Lithograph by C. Wildt after C Begas, 1840. (Courtesy of the Wellcome Trust. Creative Commons Attribution 2.0 Generic [CC BY] license,

Associated Disorders

  • Central nervous system injury
  • Movement disorders
  • Peripheral nervous system injury