3D Muscle Reconstruction Reveals 3.2 Million-Year-Old “Lucy” Could Stand As Erect as Modern Humans — Digital modeling of legend |
A cross-section of the polygonal muscle modeling approach, guided by muscle scarring and MRI data. Credit: Dr. Ashleigh Wiseman
Wiseman was able to use recently published open-source data on the Lucy fossil to create a digital model of the 3.2 million-year-old hominin’s lower body muscle structure. The study is published in the journalThe research recreated 36 muscles in each leg, most of which were much larger in Lucy and occupied greater space in the legs compared to modern humans.
Completed views of the polygonal muscle modelling approach in AL 288-1, in which 36 muscles were created per lower limb. The polygonal muscles of AL 288-1 are shown in comparison to 3D muscles of the human which were segmented from MRI scan data. Credit: Dr. Ashleigh Wiseman “We are now the only animal that can stand upright with straight knees. Lucy’s muscles suggest that she was as proficient at bipedalism as we are, while possibly also being at home in the trees. Lucy likely walked and moved in a way that we do not see in any living species today,” Wiseman said.would have roamed areas of open wooded grassland as well as more dense forests in East Africa around 3 to 4 million years ago.
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