The hope is that the virtual brain will help shed light on some aspects of human cognition, such as perception, memory and perhaps even consciousness.

It will be the first time humans will be able to observe the electrical code our brains use to represent the world, and to do so in real time, says Henry Markram, director of Brain and Mind Institute at the Ecole Polytecnique Fédérale de Lausanne (EPFL), Switzerland.

Using pioneering techniques, they have studied precisely how individual neurons behave electrically and built up a set of rules for how different types of neurons connect to one another.

Very thin slices of mouse brain were kept alive under a microscope and probed electrically before being stained to reveal the synaptic, or nerve, connections. “We have the largest database in the world of single neurons that have been recorded and stained,” says Markram.

The end product, which will take at least a decade to achieve, can then be stimulated and observed to see how different parts of the brain behave. For example, visual information can be inputted to the visual cortex, while Blue Brain’s response is observed.