high steppage gait

n.
  1. A gait in which the foot is raised high to avoid catching a drooping foot and is then brought down suddenly in a flapping manner, often due to paralysis of the peroneal and anterior tibial muscles.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.