If you quickly and continuously stimulate two points on the human skin that are close to each other, the skin between the two points will feel stimulated, as if there is a little rabbit running, this illusion of skin is called "skin" by the Japanese scientific community Rabbit illusion ". Japanese researchers have recently discovered that human body control tools also produce "skin rabbit illusion."
A research team from Kochi University of Technology in Japan wrote in the new issue of The Journal of Neuroscience that the "skin rabbit illusion" is an illusion that occurs when the brain tries to process multiple stimuli at short intervals at the same time. . Previously, it has been theorized that the brains of humans and primates treat tools and objects in their hands as part of their bodies. This study found that the human body control tools also produce "skin rabbit illusion", which further proves this theory.
The research team leader Miyazaki told reporters that during the experiment, they asked eight young volunteers who were tested to close their eyes, plug their ears, and put up a 10 cm long and about weight between their index fingers 13 grams of aluminum strips, so that they kept a distance of about 10 centimeters between their index fingers. The researchers then used the machine to tap the volunteer's finger three times. They first tapped quickly on the volunteer's left index finger twice, with an interval of 0.8 seconds. About 0.8 seconds after the two quick taps were completed, they tapped again on the volunteer's right index finger. In this way, about 70 sets of above-mentioned taps were repeated for each volunteer, and finally the volunteers were asked where they felt hit.
The results showed that in the three taps, the volunteers almost felt the correct position for the first tap, but for the second tap, they mostly said that they felt the position of the tap on the aluminum bar, and About 3 cm from the actual hitting point. For the third tapping, volunteers still believed that the tapping point was on the aluminum bar, which was about 1.5 cm away from the actual tapping point. The volunteer felt something on the aluminum bar ran over. If you put square aluminum pieces on the index fingers of both hands and then give the same percussion, this illusion will not occur.
Miyazaki said that the control tool also produces a "skin rabbit illusion" because the brain treats the tool as a part of the human body when processing information.
Miyazaki pointed out that if you can understand the specific principle of the human body producing this illusion, you can develop prostheses, tools, and snowboards that can be used like a part of the body.
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