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.

Spinal cord of a goat with necrotic areas in the 11th dorsal (thoracic) and 2nd lumbar roots

Ascending and descending degeneration is shown in the sections above and below these levels (Boycott and Damant). (Source: Hill L. Caisson sickness and the physiology of work in compressed air. London: Edward Arnold, 1912. Public domain.)