Mapping Neurons and Brain Functions Having both a map of the whole fly brain and the sum of its parts should allow researchers to have a more sophisticated look at how such systems function. “If we ...

The human brain houses about 86 billion neurons. The creation of new nerve cells is called neurogenesis. This process isn’t well understood.

This might seem like a small victory compared to a human brain, which contains 80 billion neurons and 100 trillion connections, but it's a huge leap from where neuroscientists started in the 1960s.

The map shows how the brain’s 140,000 neurons, or nerve cells, make close to 50 million connections between them. By comparison, the human brain contains around 87 billion neurons.