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Related Experiment Videos

Man: the imperfect biped.

M A Caselli1, S L Alchermes

  • 1Department of Podopediatrics, New York College of Podiatric Medicine, New York.

Clinics in Podiatric Medicine and Surgery
|July 1, 1988
PubMed
Summary
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Modern humans evolved upright posture and bipedalism millions of years ago, yet our foot structure may not have kept pace with environmental changes. This evolutionary mismatch could explain common foot and gait problems in humans.

Area of Science:

  • Paleoanthropology
  • Biomechanics
  • Human Evolution

Background:

  • Human upright posture and bipedalism are estimated to have existed for 12 to 14 million years.
  • Australopithecine hominids, existing 3 to 4 million years ago, exhibited foot structures nearly identical to modern Homo sapiens.

Purpose of the Study:

  • To investigate the potential evolutionary lag between human ambulatory structures and modern environmental demands.
  • To explore the link between the evolution of the human foot and the prevalence of foot and gait problems.

Main Methods:

  • Comparative biomechanical analysis of ancestral and modern hominid foot structures.
  • Review of evolutionary timelines for bipedalism and environmental changes.

Main Results:

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  • Significant evolutionary history of upright posture and bipedalism in human ancestors.
  • Remarkable similarity between Australopithecine and modern human foot anatomy.

Conclusions:

  • The human foot and ambulatory system may not have sufficiently evolved to meet the demands of modern environments and activities.
  • An evolutionary mismatch is hypothesized as a contributing factor to the high incidence of human foot and gait issues.