Maps of targets
Once a neurone is connected to its target, for example in the eye, the ends branch to make many synapses. The positions of these connections are faithfully relayed back to the brain, creating a 'map' of the target. For example, neighbouring nerve fibres on the retina of the eye remain next to each other as they carry their information to the brain. So the brain always knows that the information from the different nerves in the eye always goes together in a certain pattern.