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  • 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.

Ixodes holocyclus tick, fully engorged

A fully engorged adult female Ixodes holocyclus tick showing the darker first and fourth pairs of legs. Photograph by Commonsource (2002). (Courtesy of Wikimedia Commons. Creative Commons Attribution 3.0 Unported License.)

Associated Disorders

  • Acute ascending paralysis