Neanderthals walked upright just like humans today

A new research finds that unlike popular belief that showcases Neanderthals having straight spines and poor posture, the prehistoric humans were more similar to us than many assume.

Researchers from University of Zurich have shown that Neanderthals walked upright just like modern humans, thanks to a virtual reconstruction of the pelvis and spine of a very well-preserved skeleton of an elderly male Neanderthal unearthed in La Chapelle-aux-Saints, France.

Notably, an upright, well-balanced posture is one of the defining features of Homo sapiens.

Popular scientific notion since the 1950s is that the Neanderthal is a hunched over caveman. Their similarities to ourselves - both in evolutionary and behavioral terms - have also long been known, but in recent years the pendulum has swung in the opposite direction. "Focusing on the differences is back in fashion," says Martin Haeusler, author of the study. For instance, recent studies have used a few isolated vertebrae to conclude that Neanderthals did not yet possess a well-developed double S-shaped spine.

However, a virtual reconstruction of the skeleton from La Chapelle-aux-Saints has now delivered evidence to the contrary. This computer-generated anatomical model was created by the research group led by Martin Haeusler from the University of Zurich and included Erik Trinkaus from Washington University in St. Louis. The researchers were able to show that both the individual in question as well as Neanderthals in general had a curved lumbar region and neck - just like the humans of today.

When reconstructing the pelvis, the researchers discovered that the sacrum was positioned in the same way as in modern humans. This led them to conclude that Neanderthals possessed a lumbar region with a well-developed curvature. By putting together the individual lumbar and cervical vertebrae, they were able to discern that the spinal curvature was even more pronounced. The very close contact between the spinous processes - the bony projections off the back of each vertebra - became clear, as did the prominent wear marks that were in part caused by the curvature of the spine.

Wear marks in the hip joint of the La Chapelle-aux-Saints skeleton also pointed to the Neanderthals having an upright posture similar to that of modern humans.

"The stress on the hip joint and the position of the pelvis is no different than ours," sid Haeusler, adding, "On the whole, there is hardly any evidence that would point to Neanderthals having a fundamentally different anatomy."

"Now is the time to recognize the basic similarities between Neanderthals and modern humans and to switch the focus to the subtle biological and behavioural changes that occurred in humans in the late Pleistocene," Haeusler added.