In addition, all of her limb bones were found to be very strong relative to her body size, indicating that she had exceptionally strong muscles, more like those of modern chimpanzees than modern humans.
November 30, The fossils that make up the Lucy skeleton. Bones are built similarly. She lives in Cockeysville, Maryland. Previous work on chimpanzees and gorillas revealed that measurements like these matched up with locomotion behavior.
The new study analyzed CT scan images of her bones for clues to how she used her body during her lifetime. This could provide insight into the types of trade-offs that were made when humans developed their large brains.
Studies have shown that the cortical bone in the shaft of the racquet arm is more heavily built up than that in the nonracquet arm. Our results are intuitive because they depend on the sorts of things that we experience about objects — including body parts — in everyday life. For 11 days, John Kappelman, Ph.
Be the first to know. UT Austin paleoanthropologist John Kappelman added: A reduction in muscle power later in human evolution may be linked to better technology that reduced the need for physical exertion and the increased metabolic demands of a larger brain, the researchers say.
High-resolution CT scans were necessary because Lucy is so heavily mineralized that conventional CT is not powerful enough to image the internal structure of her bones. Our study is grounded in mechanical engineering theory about how objects can facilitate or resist bending.
If, for example, a tube or drinking straw has a thin wall, it bends easily, whereas a thick wall prevents bending.
Paleoanthropologist Christopher Ruff of Johns Hopkins is lead author of the new study. Ruff explained that bones can tell us a lot about our limbs: Visit the eLucy website to learn more about Lucy. For 11 days, John Kappelman and Richard Ketcham, both professors at the University of Texas at Austin, carefully scanned all of her bones to create a digital archive of more than 35, CT slices.
Our results show that the upper limbs of chimpanzees are relatively more heavily built because they use their arms for climbing, with the reverse seen in humans, who spend more time walking and have more heavily built lower limbs.
High resolution CT scans that reveal structure inside the fossil bones of a 3. This now-extinct species is thought to be a human ancestor. A reduction in muscle power later in human evolution may be linked to better technology that reduced the need for physical exertion and the increased metabolic demands of a larger brain, the researchers say.
Lucy was a petite 3 feet 6 inches just over cm in height. Studies have shown that the cortical bone in the shaft of the racquet arm is more heavily built up than that in the nonracquet arm.Our ancient relative Lucy spent more time in trees than previously thought according to a new analysis of our ancient ancestor's fossilized remains.
Our ancient relative Lucy spent more time in trees than previously thought.
By Deborah Netburn is the first to mine the internal bone structure of the world’s most famous Australopithecus. The research team first had a look at Lucy's bone structure during her U.S.
museum tour inwhen the fossil was detoured briefly to the High-Resolution X-Ray Computed Tomography Facility in the University of Texas at Austin Jackson School of Geosciences. The new study uses CT slices from those scans to quantify the internal structure of Lucy's right and left humeri (upper arm bones) and left femur (thigh bone).
In contrast, the only damage we see on Lucy's bones is a single carnivore tooth puncture mark on the top of her left pubic bone. This is what is called a perimortem injury, one occurring at or around the time of death. The new study uses CT slices from those scans to quantify the internal structure of Lucy’s right and left humeri (upper arm bones) and left femur (thigh bone).Download