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.

American dog tick, female

A female American dog tick, Dermacentor variabilis, on a blade of grass (dorsal view). Photograph by James Gathany. (Courtesy of the Public Health Image Library, Centers for Disease Control and Prevention. Public domain.)

Associated Disorders

  • Acute ascending paralysis