Overturning the ``how to swim sperm'' that has been believed for 340 years, reproducing sperm swimming in 3D looks like this
Since it was confirmed in the 17th century that ``sperm swims by swinging their tails like snakes'', this has become an accepted scientific theory. is moving forward like a screw”. This discovery is expected to advance research on male fertility.
Human sperm uses asymmetric and anisotropic flagellar controls to regulate swimming symmetry and cell steering | Science Advances
Scientists Disprove 340-Year-Old Belief on How Sperm Moves: Apparently, They Like to Spin | Science Times
https://www.sciencetimes.com/articles/26700/20200801/scientists-disprove-340-year-old-belief-sperms-move-apparently-spin.htm
In 1674, Antoni van Leeuwenhoek invented the microscope and discovered microorganisms, which greatly advanced science. After that, in 1677 Leeuwenhoek confirmed the sperm with a microscope and wrote a letter to the secretary of the Royal Society that ``sperm swims by moving their tails like snakes and eels''. Leeuwenhoek's discovery has become a scientific theory, as scientists have actually confirmed how sperm swim under a microscope.
However, 3D microscopy and mathematical knowledge have overturned some 340 years of dogma.
According to a study published in the scientific journal Science Advances by Hermes Gadelha, a representative of the Polymaths Laboratory and an engineering mathematician at the University of Bristol, sperm swims like an `` otter '' rather than an eel or a snake. Otters are known to swim in a twisting motion.
It looks like this when actually reproducing the appearance of sperm swimming with 3D animation.
Human sperm swims like a corkscrew in 3D-YouTube
Looking at the trajectory, you can see that the sperm is moving forward by moving the tail in a circular motion.
Looking from the front like this.
In addition, you can check how the otter swims in the same way from the following movie.
Eurasian otter rolling and swimming in the tube - YouTube
Researchers such as Gadelha confirmed sperm movement using a high-speed camera that records 55,000 frames per second. As a result, it turned out that the tail of the sperm 'moves and rotates together with the sperm body' instead of the long-believed movement of 'swinging the tail from side to side like a snake'. Sperm advances forward by rotating only in one direction like a corkscrew.
The researchers were so surprised by this discovery that they spent the next two years conducting repeated checks and mathematical confirmations of their findings.
It is thought that this discovery may be the key to unraveling the mysteries of sperm movement and health. Researchers hope that this finding will advance research on male fertility.
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