Human brain depiction according to latest research
An exciting news is surfacing on web that Google has developed a map of a human brain. A small part of the brain is covered in it. A very detailed representation of nerve cells (neurons) were shown in it and the connections between them is depicted in a beautiful and appealing way.
The map can be seen freely online. It currently contains 50,000 cells. The cells in it can be viewed in 3D form with innumerable spider web-like protrusions. Total 130 million connections (wires) are shown in it . In terms of petabytes the data of 50,000 brain cells is equal to 1.4 petabytes. You will be amazed to know that it takes up to 700 times the capacity of a modern computer.
The data in it is so big that scientists have not yet gone through it in detail. The expert, Warren Jane, says it is the first step and is similar to the study of the human genome, which is still being researched 20 years later. In the same way, this journey of brain mapping will continue.
“This is the first time we’ve seen the actual structure of such a large part of the human brain, and I’m thrilled to learn that such a detailed map of the brain has been created,” said Catherine DeVillek, a Harvard University expert.
This brilliant effort was begin by the Jeff Litman, a scientist at Harvard University. Once he found a piece of a human brain of a 45 years old epilepsy patient. The patient who could not get treated and cured by any medicine. This corner was located on the left side of the hippocampus and was causing epilepsy. So during this time, some of the healthy cells of the brain were also sampled out.
After removing these samples from the brain, these samples (the part of the brain) was preserved in different types of chemicals. Then It was dipped in osmium ( one of the heavy metal). The outer surface of the cerebral cortex get cleared and an electronic microscope made it possible to see each cell clearly. This part of the brain was then dipped and saved in a transparent glue where it get hardened. The brain part was then cut into 30 nano meter thin slices. It was a thousand degree thinner than a human hair. Each corner was then photographed with an electronic microscope and was further improved.
This was followed by a 3D map of the area where artificial intelligence and machine learning was in place. Thus different types of cells were identified with it. Other experts called this resulted dateset a great innovation and a treasure.
It will open more horizon for brain research and more discoveries are possible.
It should be noted that to map an entire human brain would require a very very large dataset . This dataset should be 1000 times larger (zettabyte). About it Lichtman says “comparable to the amount of digital content generated in a year by the planet Earth”.