Blue Brain project accurately predicts connections between neurons

Blue Brain project accurately predicts connections between neurons: To their great surprise, they found that the locations on the model matched that of synapses found in the equivalent real-brain circuit with an accuracy ranging from 75 percent to 95 percent...

This means that neurons grow as independently of each other as physically possible and mostly form synapses at the locations where they randomly bump into each other.
A few exceptions were also discovered, pointing out special cases where signals are used by neurons to change the statistical connectivity. By taking these exceptions into account, the Blue Brain team can now make a near perfect prediction of the locations of all the synapses formed inside the circuit.