Mar 18, 2021
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It's a Fingerprint Function for Human Life
It's a Fingerprint Function for Human Life
Hand illustrations and fingerprints.
In 1910, Thomas Jennings managed to escape the murder scene, but left behind a small, overly important clue. The clue that chooses his fate before the law as a murderer is a fingerprint.
In addition to the issues handled by Inspector Eduardo Alvarez in Argentina, Jennings' issue was the first, in a criminal investigation, to make fingerprints evidence of a crime.
After the Jennings issue, the role of fingerprints became too vital in forensic investigations. This unique identity marker is too ideal to lead justice officers to find a criminal figure.
Of course, fingerprints are not only useful to identify each human being. Regardless of the importance of forensic investigation, fingerprints are counted as having other functions.
"People have two inspirations about fingerprints, which is to support strengthening the grip, and that supports improving perception of touch," said Professor Roland Ennos, a biomechanics and biology researcher at the University of Hull, in the UK as quoted from Live Science.
It's a Fingerprint Function for Human Life
Fingerprint scanner technology on Qualcomm screens.
Scars against fingerprints create friction between the human hand and the surface of the object it touches. Thanks to this condition, humans are able to grip the wet surface, keeping hands from slipping.
Fingerprints are also useful to prevent blisters. According to Ennos, fingerprint strokes are calculated to make the skin not easily blistered. While against the same fitting, calculated fingerprints allow the skin to stretch against the right angle.
Meanwhile, Georges Debregeas, a biologist at Sorbonne University in Paris, France, mentions the fingerprint function in more detail. According to him, against our fingers there are four types of mechanical receptors, or cells that respond to mechanical stimulation (such as touch).
One of its receptors is pacinian blood cells, which are approximately 2 millimeters below the surface of the skin at the fingertips. These receptors mediate perception of texture.
When a human touches an object's surface, its fingerprints send vibration frequencies to pacinian blood cells that are too sensitive. Thanks to this, mechanical receptors are able to hold sensory info.
It's a Fingerprint Function for Human Life
The hand of a baby gorilla at the Zoological Park of Saint-Martin-la-Plaine, France.
However, what does this sensory info do for human life? For thousands of years, human hands have been an important tool for finding and producing food. Finger sensitivity to texture is too useful to detect the type of food that is worth consuming.
"The reason why we need to detect and sort by texture is because we crave separating good food from bad food," Debregeas said. Touch sensitivity supports humans to stay away from rotten or infected food.
In addition to humans, fingerprints and pacinian blood cells are counted as belonging to other animals, such as chimpanzees and koalas, who rely on touch sensitivity to find the right food.
Debregeas's theory was also about, along with Ennos's confession, about fingerprints that were able to strengthen the grip. "Fingerprints are too likely for us to correct the force immediately when we're going to grip an object," Ennos added.
For example, when a human hand slips onto something, the fingerprint supports surface change detection so that the hand can adjust the grip. This shows that the senses of human touch and grip develop together simultaneously.
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