Scientists created a highly precise model of the human brain

A major milestone in brain research has been reached with the creation of a 3D model of the human brain, thanks to the mapping of brain cells and nerve connections from a sample piece no larger than half a grain of rice. The data, amounting to hundreds of terabytes, has allowed researchers to create the largest 3D model to date.

The model, which is about the size of a cubic millimeter, includes 57,000 cells, 230 millimeters of blood vessels, and 150 million synapses. The sample used for the modeling was obtained from a 45-year-old woman whose brain was operated on for epilepsy treatment. It came from the cerebral cortex, which is responsible for functions such as learning, problem-solving, and sensory perception.

To create the model, the sample was immersed in preservatives and stained with heavy metals to distinguish cells. It was then cut into 5,000 pieces, each 34 nanometers thick

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