Title

Hallucal Tarsometatarsal Joint in Australopithecus afarensis

Publication Title

American Journal of Physical Anthropology

Publication Date

6-1990

Document Type

Article

DOI

10.1002/ajpa.1330820202

Keywords

bipedality, hominid evolution, locomotion

Disciplines

Anthropology

Abstract

Hallucal tarsometatarsal joints from African pongids, modern humans, and Australopithecus afarensis are compared to investigate the anatomical and mechanical changes that accompanied the transition to terrestrial bipedality. Features analyzed include the articular orientation of the medial cuneiform, curvature of the distal articular surface of the medial cuneiform, and the articular configuration of the hallucal metatarsal proximal joint surface. Morphological characteristics of the hallucal tarsometatarsal joint unequivocally segregate quadrupedal pongids and bipedal hominids.