What will the human being be like in 1,000 years? What about 100,000? It is difficult to know, but we may be somewhat different than we are now: evolution is slow but inexorable.
That is of course what a new study by several researchers points out that reveals something curious: more and more humans have an extra artery in the arm.
Having a median artery can have advantages, but also disadvantages
It is called the satellite artery of the median nerve (or “median artery”) and is an occasional anatomical variant that usually forms during the first weeks of life of the fetus.
This artery appears in the center of the arm and is responsible for bringing blood to the hands as they grow, but normally it usually regress at eight weeks.
That is when the normal thing is that stop developing and the other two arteries (ulnar and radial, the latter being the one we use, for example, to detect the pulse) are responsible for this function.
Now a group of researchers has discovered something curious: that extra artery that usually disappears soon it appears more and more frequently in humans.
Anatomy expert Teghan Lucas explained how “the prevalence was around 10% in people born in the mid-1880s, who compared to 30% in those born at the end of the 20th century, and that supposes a significant increase in a really short period of time if we talk about evolution “.
After analyzing 80 limbs from cadavers donated by descendants of people in Australia and Europe, these anatomists discovered that the presence of the artery was becoming more frequent. “This increase could be the result of gene mutation involved in the development of the median artery or health problems in mothers during pregnancy “.
Having that extra artery could lead to more dexterous fingers or stronger forearms, but it is also true that the presence of this artery in adults poses a greater risk of suffering from carpal tunnel syndrome.
According to these researchers, “if this trend continues, most people will have the median artery of the forearm by the year 2100“It’s not a huge evolutionary difference, but it certainly shows that humans continue to evolve. And if we don’t do it alone, transhumanism will try to get us to do it with external elements like that curious third thumb that someone came up with in 2019.
Vía | Science Alert