The brain starts to develop even before a child is born and continues into adulthood. During the first few first years of a child's life, neurons, synapses and axon are multiplied to millions. The child's learning process determines the neural connections to be cut off by pruning. An active connection is retained while inactive neurons, synapses and axons are eliminated.
As the child grows, neural connections are strengthened by active participation in the learning process. But when these connections are left idle, they tend to decay.
