Any organ on the body, as long as it is able to move by our own control, want to move, do not want to move on the immobility, unless there is an external force to change, for example, your mother in the morning, you do not get up, take the broom to hit you when.
But recently on the Internet there is a very interesting challenge fire, hanger set head, head will involuntarily turn to the left or right, as if there is a mysterious force in the control of your head.
The video was initially released by a microblogger @WankerStudio, which aroused the curiosity of the majority of netizens, so is it true? Why does the head turn?
The props for this experiment are simple, everyone can turn over a coat hanger at their fingertips and try it out without knowing if it's true.
Of course I put a coat hanger on my hard, huge head, and like most people didn't react except for the pain of my head being pinched, and I didn't feel a tendency to rotate.
My hanger started out like this:
It was tough, strong, resilient, top-notch workmanship, and seemed perfectly fine, so why didn't it achieve the head turning effect? Is it because all the videos on the internet are staged?
I think that since so many people have made the effect of turning the head, it should be right, it is likely to be the hanger where there is a problem, it can not be my head can not it, after all, are all Chinese people.
So after some fumbling, and observation, I processed the hanger a little bit, and it became like this:
I broke the position of the hanger circle a little bit, so that it formed a more prominent angle, and when it was put on the head, it was able to fit the head more tightly.
When I put the modified hanger on my head again, something magical happened. My head turned involuntarily, whichever way the hanger's hooks were facing.
When the head is turned to the side, there is a feeling of returning to the right place, it is very easy, on the contrary, when it is kept in the right place, it seems to be hard.
Overall, the feeling is very refreshing and magical, like a mysterious force is calling to my head!
Those who have not made this experiment can refer to my approach, break the hanger, be sure to choose a better quality hanger, at least hard, to be able to feel there is a strong feeling of pinching the head.
So why does the head turn involuntarily?
First of all the magical turning of the head occurs, something must have been used to exert a turning force on the head, so the question is whether this force is from the hanger? Or is it itself your own muscles that are driving the head around?
First we look at the hanger over the head, the force exerted on the head is nothing more than the three in the picture above. So could it be that our head is not a perfect circle, and that these three forces on the head are of varying magnitude and do not go past the center point, and that as a result a torque is created that provides a very small, and short-lived, tendency for the head to rotate.
Causing the head to rotate in response to this torque seems plausible at first glance! But this argument doesn't explain why the head keeps having the urge to rotate to one side when you keep the hanger on your head. Could this rotational inertia be there all the time?
Obviously not, it would be a perpetual motion machine! After all, the torsional force that the hanger puts on the head only occurs the moment it's instantly put on.
So the twisting force on the head doesn't come from the hanger, but from our own neck muscles. So why would the hanger induce the neck muscles to rotate?
In fact, this phenomenon is not something that has only been discovered now, but has been studied in detail by academics as early as 1991, under the name: Hanger Reflex Phenomenon.
The researchers first installed sensors on the heads of the subjects to measure the amount of force exerted by the hanger, and then placed the hanger on the subjects' heads to measure the distribution and magnitude of the force exerted by the hanger on the head.
The result was that the hanger did exert three forces on the head, but whether the head was turned to the left or the right, two of the forces were always greater, and the other was smaller and seemingly negligible.
The two larger forces were mainly distributed in the left front, right back, right front, and left back of the head, and the researchers next tried dropping the other smaller force by changing the hanger to a diamond shape.
It's clear that such a hanger on the head would provide only two forces, the two larger ones shown above. Next, the experiment continues:
The results of the experiment are clear, under the two forces, the head can still be spontaneously turned to the left or right, which confirms the previous experiments of the conjecture, in fact, only the two distributed in the left front, right back, or right front, left back of the force is playing a role.
And it proves that the rotation of the head has nothing to do with which direction the hook of the hanger is in.
Now that the goal is becoming clearer, which force is controlling the rotation of the head, left front, right front, or right back, or left back? Keep experimenting.
The experimenters blocked two of the forces with a plastic plate, leaving only one to act on the head at a time, and found that when the left and right fronts of the head were subjected to the force, an involuntary rotation occurred.
This makes it clear that you are actually holding your head in a hanger, and that rotation only occurs when the fronto-temporal portions of the left and right sides of your head are compressed.
So you can put the hanger over your head like the picture above, as long as the force is applied to the forehead area, those two forces behind it don't matter, and you can feel the magical turning force that way too.
The results were now so clear that the researchers developed a device that applies a force to each side of the frontotemporal region.
The effect of putting him on the head looked like this:
The results were now clear that the head would turn not because the hanger actually exerted a torsional force on the head, but rather that when you put a force on the left front or right front of the head, that force creates a shear force with the right back and left back.
Originally this shear force would not cause a person's head to turn, but the force induces a reflex in the nerves, and so we have the magical impulse to turn the head.
You may be thinking at this point, "What's the point of studying this now that I've figured it out?
Think about this device that gives you the urge to turn your head, and the researchers suggest that it could be used for navigation. When you're going somewhere, you enter your destination into the software and put on the head-pressure device, and the system can tell you in advance whether to turn right or left when you turn.
But going out with an antenna headgear does look a bit sandy, so I guess no one will use it.
But the discovery also has a non-sandboxing use; it could be used to treat patients with rotational dystonia. The research team looked for 23 such patients from seven medical institutions. After 3 months of treatment, the rotational neck was significantly improved. Below is one of them:
Figure A could only turn her neck to the right at first, but with the assistance of the neck-turning device, after three months Figure B.C could already turn left without the device.
So this is still a useful discovery, if you have a drop pillow and your neck is very painful to turn, you can put a hanger on your head and turn your neck under the nerve reflexes, it is very easy, you can try it.