3D models of the skulls from a modern human and from a Neanderthal
With the permission of Kimberly Anne Pump
A skull -abnomality that presses the lower brain that often causes headaches and other neurological problems can be part of our genetic heritage from Neanderthals.
People with Chiari misunderstanding have a smaller and flatter base of the skull surrounding the area where it connects to the spine. As a result, part of the brain – cerebellum – burst into the spinal canal of the neck.
Type 1 Chiari Misdoors, The Mildest Form, is believed to affect up to 1 in 100 people. They can cause symptoms such as headaches, neck pain, sleep apnea and numbness, but some people never show signs at all.
For approx. 15 years ago, Yvens Barbosa Fernandes, a neurosurgeon at State University of Campinas in Brazil, noted that the base of his Chiari patients’ skulls reinstated those he had seen in Neanderthal tests in European museums, especially in the mild slope of the occipital bones where cerebellum stays. While Neanderthal brains were larger than modern humans, they are sloping more back from the forehead and across the base, giving them a flatter form compared to the rounder form of modern human skulls.
In 2013, Barbosa Fernandes published a hypothesis -proposal that Chiari Skull -Form might have been inherited from extended human being mixed with Homo sapiens. “I began to believe that there was a lost connection between anthropology and medicine in Chiari boxes,” he says.
Inspired by this proposal, Kimberly Pump built at the University of the Philippine’s Diliman in Quezon City and her colleagues digital 3D models of the skulls of 46 people with Chiari Types 1 and 57 without Chiari, based on their CT scan. Their detailed mathematical analyzes confirmed that chiari-abffected skulls had a smaller occipital bone with a flatter angle and more brain compression at the bottom of the skull where cerebellum sits.
Next, the team examined how the modern skulls compared to digital models of eight fossil heads from Homo Neanderthalensis,,,,,,,, Homo erectus,,,,,,,, Homo Heidelbergensis and old Homo sapiens.
They found that skull bases of Neanderthal heads had reintroduced similar measurements as for modern humans with chiari, while all the other ancient cranial basics looked like modern humans without chiari. “It highlights the idea that this is Neanderthal Properties – not only early Pull, “she says.” It seems that this is just another way that Neanderthalgens can affect our health – and in this case in a negative way. “
For Barbosa Fernandes, the study provides strong evidence in support of his theory. “It makes sense: If you have less angling, you have less room for the modern human brain,” he says. “I didn’t have the science of my hypothesis. This paper is a big step closer to this proof.”
As a next step, the team hopes to analyze DNA for people with Chiari Misdoors to look for Neanderthals, says Plump.
Other types of chiari -misunderstood – types 2 to 4 – are believed to have different causes. Type 2 is linked to a serious form of spina bifida, while types 3 and 4 are extremely rare and can be life -threatening.
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