Hearing, taste, touch and smell are developing in the fetus long before birth into the light and all these feelings are quite well studied by scientists. To the question about the study of vision in the fetus science was not quite ready to date, due to underdeveloped methods and technologies. Fortunately, scientists were able to develop the latest techniques that allow studies of the development of vision in the fetus in the womb.
During the study of the visual reactions in the unborn child, the researchers conducted the experiment on 39 women and their fruits. On the uterine wall projected image, consisting of 3 infra-red dots, somewhat reminiscent of a human face. Using 4D ultrasound examination specialists were monitoring the presence of any response in the fetus. The results showed that in order to consider a person, unborn babies turned their heads towards the images. In other words, by the beginning of the second trimester of pregnancy, the child’s eyes still not able to see images but they can detect light.
Previously it was assumed that light-sensitive cells in the still developing retina, which is presented moshopoulou cloth at the back of the eye, done the switch in order to establish circadian rhythms, which control sleep and wakefulness in infants. Scientists from the University of California managed to find evidence that a simple cell is able to actually communicate with each other, creating an interconnected network that gives the retina a much greater sensitivity. The researchers believe that an interconnected network can enhance the effect of light on behavior and brain development.
In the developing organs of the unborn child is, presumably, about 3% of the ganglion cells, which send alarm messages through the optic nerve to the brain, while possessing high sensitivity to light. Today, scientists discovered about six different subtypes that are actively engaged with different parts of the brain. Some subtypes carry signals to suprachiasmatic the core to a certain way to set our biorhythms, while the remainder sends signals to the area of the brain that causes our pupils narrow in bright light.
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As the portal sсiencedaily.com, photosensitive ganglion cells in the retina was discovered only 10 years ago, when scientists were able to prove the effect of the spontaneous electrical activity of the eyes during development of the fetus in the womb. As it turned out, the development of the retina is key for building a true networking of the brain for further processing the images. In order to prove it, the graduate student from California had to combine two-photon calcium imaging, electrical recording of whole cells, and pharmacology, which, coupled with the application of some anatomical techniques, led to the discovery of slotted connections of certain parts of the brain, not only capable of detecting light, but also responsive to its intensity.