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Newsweek: Scientists find a small brain similar to the human brain

2019-09-03T07:53:35.124Z



Scientists have found a small brain that resembles a human brain a million times smaller, claiming to have detected neural activity.

About two months after this 10-month operation, as Newsweek reports, the tissue began to produce brain waves. However, one of the authors of the study stressed that these brains are still unable to think and have no awareness.

In her article published in the American Journal, Kashmir Gander highlighted the prospects for what she called scientific achievement and its limits.

Scientists have created three-dimensional models similar to the human brain in a laboratory to use to study how our bodies work, called brain organoids.

In addition, the participants hope that these miniature organs will help reveal how the brain develops, which is not easy to do on the human brain.

It should be noted that these models can help in the treatment of some mental and neurological conditions associated with the brain such as schizophrenia, autism and epilepsy.

"Brain organoids can be used to study many things, including understanding natural human neurodevelopment, disease modeling, brain development and drug testing," said Alison Motree, a biologist at the University of California, San Diego, the lead author of the study. Command to teach artificial intelligence. "

In order to create these objects, scientists have developed stem cells that can develop into many types of cells in the body, in a natural environment similar to those in which the brain grows. In general, this led to the transformation of cells into different types of brain cells that formed a structure similar to the human brain.

A bioethics committee representing all segments of society oversees such experiments and ensures that there are no ethical implications for the reconstruction of the human brain in laboratories.

Algorithm
According to the study, the team developed a machine learning algorithm based on brain activity waves that have been detected in a number of preterm infants between six months and 9.5 months. These algorithms have successfully predicted the growth of these organisms.

These new brains contain complex neural networks, which develop when neurons communicate with each other. This experiment was not the first of its kind. Scientists have previously found organic bodies that resemble the human brain, but this is the first time they have been able to create active neural networks.

"The level of neuronal activity we see is unprecedented in the labs," Motry said.

Asked if the organisms were brain organisms capable of developing consciousness, she said, "These brains are still prototypes and do not contain other brain parts and structures that exist in the human brain. Therefore, the activity observed may have nothing to do with real brain activities."

A biology ethics committee representing all segments of society oversees such experiments and ensures there are no ethical implications for the reconstruction of the human brain in laboratories, she said.

But Lorenzo Fabrizi, a research fellow at the Department of Neurology, Physiology and Pharmacology at the University of California, Los Angeles, who did not participate in the study, praised the findings of the team, saying: "These models can help us understand how brain structures and function interact with each other. Some have a balance between genetic signals and activity-based mechanisms. "

Source: aljazeera

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