Limited timing of cell division. The time that a cell loses its capacity for DNA synthesis determines its eventual address. Larger neurons are usually generated earlier. Sequence of cell proliferation is characteristic for each region of the brain. Glial cells provide scaffolding.
Cells aggregate with others of a similar kind - molecules aid in recognition.
Cells adopt a preferential orientation. Most neurons generate processes only after they reach their final position. Pattern of dentritic branching may be genetically determined, but mechanical influences can modify the form of the neuron. Growth is controlled by growth cones. Fasciculation - tendency of neurons to grow in close association with their neighbours.