Neuronal development is the process by which neurons (nerve cells) in the brain are formed, differentiated, and organized to create the complex neural networks that govern brain function. This process involves the proliferation, migration, differentiation, and maturation of neurons, as well as the formation of synapses and neuronal connections. Understanding neuronal development is essential for understanding how the brain develops, functions, and can be affected by various genetic and environmental factors. Research in this area often focuses on neurogenesis, neuronal migration, axon guidance, synaptogenesis, and neural circuit formation.