Chimp 2.6.1.8 isozone7/4/2023 This approach is consistent with evidence that an early hominid (hominin) behaviour was bipedal gait, which would have ‘freed the hands’ for greater use of tools. Although no comprehensive account has been offered, there is general agreement that the anatomical reconstruction of the hand during human evolution was somehow linked with tool behaviour. This striking exception to the primate pattern clearly requires an evolutionary explanation ( Marzke & Marzke, 2000 Fig. In contrast, the human hand has a much larger, more muscular, mobile, and fully opposable thumb combined with fingers that have shortened and straightened. The typical primate hand is characterized by a diminutive thumb in combination with long, curved fingers ( Midlo, 1934).
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