Sign Up for a Free Account

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

Sign Up for a Free Account For information on discounts, see Plans & Pricing

  • 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.

Trismus in tetanus

Early manifestations of generalized tetanus are rigidity of the masseter muscles (lockjaw) and facial muscles, with straightening of the upper lip or risus sardonicus. (Contributed by Dr. Thiravat Hemachudha.)