'Alien hand' syndrome makes the thumb ... turn into an index finger

Do not think that only those who are redundant and lacking fingers will encounter difficulties in life. People with deformities "index fingers turn into thumbs" are also quite a lot of trouble.

You have seen people with deformities, missing fingers, but certainly never met the person who owns all 5 fingers the same. To make it easier to imagine, these people suffer from a syndrome that causes the thumb to turn into . index finger.

Specifically, the hands of people with deformities will look like this.

The phenomenon of deformity on this hand was first discovered in Columbia in 155, known as triphalangeal thumb (TPT) - a birth defect in humans. The thumb, instead of having two burns as usual, will grow another excess bone. This makes the infected person have the same two long fingers.

Saying their thumb turns into an index finger, it is just another visualization of burning. Excessive bone burning, sometimes with only stones, can sometimes be as big as burning of the index finger. Its appearance makes the hand of a person with TPT like an alien's hand.

Burning excess bones can grow at the top, making the thumb grow longer. Sometimes, it crowded between the two thumbs and decided to sprout out, creating a redundant finger like a "legend". The phenomenon of 3 knuckles usually occurs when the fetus is 3 - 7 weeks old. However, this syndrome is quite rare when only 1 / 25,000 babies are born with this malformation.

If you think that only those who are extraordinarily lacking and those who have fingers may have trouble in daily life, then you are a little confused."The longer the finger, the better" is a rather inaccurate thought.

Evolution has its own purpose, and anything that breaks the common standard brings an abnormality. 2 thumbs are the result of natural selection. When the gibbon began to walk with two legs, the upper limb was released, the fingers grasping the hunting tool gradually changed, most clearly located on the thumb.

The thumb is small but more powerful than we think. It has a special structure, which can rotate in the opposite direction with other fingers. Only the thumb can turn completely to a 90-degree angle, while the other fingers make it "so". This structure has helped people to grasp objects easily.

Besides, with a moderate length, flexible thumb joints have made all activities easier. Therefore, growing one more burner will cause "hand design" to be broken. If your thumb is disabled, how can you turn sideways? What kind of objects will we hold?

When the thumb looks "y casting" the remaining fingers, it will grow in the same direction as the other four fingers. This makes the inherent functions of fingers no longer promote their original purpose. That is not to mention a series of other daily activities that will be affected such as writing, drawing, typing the keyboard . when you have "a thumb turned into an index finger".

All movements related to fingers have half the need for thumb support. Because of possessing flexible joints, the thumb has operated independently, while coordinating with the other 4 fingers. You see, it is fortunate that we are born with the right finger length.