The evolution of easier births means slower walking and pelvis issues

The width of a person’s hip seems to be the result of complex trade evolution Higher brains and standing, depending on the greatest study of its kind.

“Your brain is growing if your pelvis is getting the same evolution, of course, it creates a conflict,” says Vagheesh narasimhan Austin at the University of Texas.

This idea, the first proposed in the 1960s, is known as an obstetric dilemma. Recently, the risk of pelvic conditions has also been proposed. The pelvic floor is a muscle layer that keeps our organs in place. If he forgets or tears it can lead to incontinence and Troubleshooting.

“Obstetric dilemma has been very well discussed,” says Narasimhan. Many previous studies have been made to relative structure with foot speed and efficiency, for example, but these research typically had small number of people and created conflicting results.

Now, Narasimhan and his colleagues have used biobank data in the UK to see 31,000 men and women. The group measured several aspects of the pelvis by the type of scanned called X-ray X-Ray X and searched for correlations with genetic variations and aspects of people healthFor example, the need for emergency Caesaria.

The results indicate that having a wider pelvis reduces the risk of complications at birth, but it creates a slower walk and the risk of pelvic floor conditions and hip osteoartritis. Meanwhile, a narrow pelbiis can accelerate the foot but increases the birth complications, back pain and knee osteoarthritis.

It is previously proposed that there is a tight and earlier born born, to reduce the risk of birth complications, but the team did not find the link between the width of the pelvic and pregnancy length. “This is that the children of humans that show that the children of other studies are not (fairly) before other ames,” says Narasimhan.

The group observed the link between the width of the Pelvic and the Honelers of Babies. “Individuals who gave birth to wider headmen often have wider piques,” says Narasimhan. “This happens because of natural selection, where we are choosing for people with that correlation.” This selection Now the end has come For C-section, they proclaimed the 2016 study.

Another discovery is that most people are associated with their hand asymmetrical movies. Being in the left or right hand usually dominates his leg, which affects the development of foot and pelvis, which can lead to light asymmetry as it grows, according to Narasimhan.

“It is a key aspect of human evolutionary biology,” he says Scott Simpson Cleveland, western booking of Ohio at the University. “Integrating anatomical, genetic, clinical and behavioral data, the authors have given significant perspectives in a single adaptation of man.”

“It’s nice to be able to exploit large data sets,” says Nicole Webb At the University of Zurich Switzerland, which has shown that Chimpanze birth channels are not much wider than people. Webb pointed out that all people in the data set were over 40 and the UK. “This work could be played by younger, more varied, more varied, more striking results,” he explains.