Abstract
The degree of hallux abduction in extant and fossil hominoids is analysed in terms of geometric relationships between the first metatarsal and the medial cuneiform and quantified by angular data, in relation to grasping ability and locomotor pattern. The ‘australopithecine’ pattern corresponds to an abducted first podal ray with some grasping abilities and seems to be derived from a ‘ Proconsul-like’ pattern rather than a ‘living African great ape-like’ pattern. The Olduvai Hominid 8 condition closely resembles that of the modern human which corresponds to a full bipedalism.
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