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Quadrupedal gait after poliomyelitis (1)

Sequential lateral images of a boy with a lateral sequence quadrupedal (bear crawl) gait after poliomyelitis. Note the accentuated anterior pelvic tilt and lumbar lordosis producing a swayback posture, the marked atrophy of the leg muscles, and the back-kneeing (genu recurvatum). The boy was photographed by pioneering British-American photographer Eadweard Muybridge and American neurologist Francis Dercum in 1885 (Lanska 2013; 2016a; 2016b). The images are from Plate 539 in Eadweard Muybridge’s Animal Locomotion (1887) (Muybridge 1887; Lanska 2016b). (Contributed by Dr. Douglas Lanska. Public domain. Courtesy of the Boston Public Library and available either through Wikimedia commons or Digital Commonwealth Massachusetts Collections Online.)

Related Media

Associated Disorders

  • Aseptic meningitis
  • Bulbar polio
  • Bulbospinal polio
  • Infantile paralysis
  • Nonparalytic polio
  • Paralytic polio
  • Polioencephalitis
  • Post-polio progressive muscular atrophy
  • Post-polio syndrome
  • Spinal paralytic polio